121111113102 has 64 divisors (see below), whose sum is σ = 283337201664. Its totient is φ = 33789621600.

The previous prime is 121111113089. The next prime is 121111113161. The reversal of 121111113102 is 201311111121.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10199773 + ... + 10211639.

It is an arithmetic number, because the mean of its divisors is an integer number (4427143776).

Almost surely, 2^121111113102 is an apocalyptic number.

121111113102 is an abundant number, since it is smaller than the sum of its proper divisors (162226088562).

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

121111113102 is a wasteful number, since it uses less digits than its factorization.

121111113102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17573.

The product of its (nonzero) digits is 12, while the sum is 15.

Adding to 121111113102 its reverse (201311111121), we get a palindrome (322422224223).

The spelling of 121111113102 in words is "one hundred twenty-one billion, one hundred eleven million, one hundred thirteen thousand, one hundred two".