121111102111010 has 48 divisors (see below), whose sum is σ = 242389962864000. Its totient is φ = 43209449699520.

The previous prime is 121111102110979. The next prime is 121111102111033. The reversal of 121111102111010 is 10111201111121.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 195670010 + ... + 196287989.

It is an arithmetic number, because the mean of its divisors is an integer number (5049790893000).

Almost surely, 2^{121111102111010} is an apocalyptic number.

121111102111010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121111102111010 is an abundant number, since it is smaller than the sum of its proper divisors (121278860752990).

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

121111102111010 is a wasteful number, since it uses less digits than its factorization.

121111102111010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391958123 (or 391958070 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 14.

Adding to 121111102111010 its reverse (10111201111121), we get a palindrome (131222303222131).

The spelling of 121111102111010 in words is "one hundred twenty-one trillion, one hundred eleven billion, one hundred two million, one hundred eleven thousand, ten".