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121220111220202 = 21271999253194327
BaseRepresentation
bin11011100011111111000001…
…101010110011110111101010
3120220012112021222021222121101
4123203333001222303313222
5111342032241433021302
61105451430022432014
734350602234350231
oct3343770152636752
9526175258258541
10121220111220202
1135696184644745
1211719329b9260a
135284013460b77
1421d1128551b18
15e0332ec2b287
hex6e3fc1ab3dea

121220111220202 has 32 divisors (see below), whose sum is σ = 183427964928000. Its totient is φ = 60078346075440.

The previous prime is 121220111220199. The next prime is 121220111220217. The reversal of 121220111220202 is 202022111022121.

It is a self number, because there is not a number n which added to its sum of digits gives 121220111220202.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1285057963 + ... + 1285152289.

It is an arithmetic number, because the mean of its divisors is an integer number (5732123904000).

Almost surely, 2121220111220202 is an apocalyptic number.

121220111220202 is a deficient number, since it is larger than the sum of its proper divisors (62207853707798).

121220111220202 is a wasteful number, since it uses less digits than its factorization.

121220111220202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98986.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 121220111220202 its reverse (202022111022121), we get a palindrome (323242222242323).

The spelling of 121220111220202 in words is "one hundred twenty-one trillion, two hundred twenty billion, one hundred eleven million, two hundred twenty thousand, two hundred two".

Divisors: 1 2 127 254 1999 2531 3998 5062 94327 188654 253873 321437 507746 642874 5059469 10118938 11979529 23959058 188559673 238741637 377119346 477483274 642552563 1285105126 23947078471 30320187899 47894156942 60640375798 477244532363 954489064726 60610055610101 121220111220202