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, 2^{121220111220222} 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".