121122222102 has 64 divisors (see below), whose sum is σ = 307661875200. Its totient is φ = 34600737600.

The previous prime is 121122222097. The next prime is 121122222103. The reversal of 121122222102 is 201222221121.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121122222103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2680674 + ... + 2725482.

It is an arithmetic number, because the mean of its divisors is an integer number (4807216800).

Almost surely, 2^121122222102 is an apocalyptic number.

121122222102 is an abundant number, since it is smaller than the sum of its proper divisors (186539653098).

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

121122222102 is a wasteful number, since it uses less digits than its factorization.

121122222102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51978 (or 51972 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 121122222102 its reverse (201222221121), we get a palindrome (322344443223).

The spelling of 121122222102 in words is "one hundred twenty-one billion, one hundred twenty-two million, two hundred twenty-two thousand, one hundred two".