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121220111220222 = 2374170394954251
BaseRepresentation
bin11011100011111111000001…
…101010110011110111111110
3120220012112021222021222122010
4123203333001222303313332
5111342032241433021342
61105451430022432050
734350602234350260
oct3343770152636776
9526175258258563
10121220111220222
1135696184644763
1211719329b92626
135284013460b91
1421d1128551b30
15e0332ec2b29c
hex6e3fc1ab3dfe

121220111220222 has 32 divisors (see below), whose sum is σ = 283832455544064. Its totient is φ = 33789578040000.

The previous prime is 121220111220217. The next prime is 121220111220227. The reversal of 121220111220222 is 222022111022121.

It is an interprime number because it is at equal distance from previous prime (121220111220217) and next prime (121220111220227).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121220111220227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35197475404 + ... + 35197478847.

It is an arithmetic number, because the mean of its divisors is an integer number (8869764235752).

Almost surely, 2121220111220222 is an apocalyptic number.

121220111220222 is an abundant number, since it is smaller than the sum of its proper divisors (162612344323842).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121220111220222 is a wasteful number, since it uses less digits than its factorization.

121220111220222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70394954304.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 121220111220222 its reverse (222022111022121), we get a palindrome (343242222242343).

The spelling of 121220111220222 in words is "one hundred twenty-one trillion, two hundred twenty billion, one hundred eleven million, two hundred twenty thousand, two hundred twenty-two".