121111111120100 has 36 divisors (see below), whose sum is σ = 263438345377200. Its totient is φ = 48328825232160.

The previous prime is 121111111120019. The next prime is 121111111120117. The reversal of 121111111120100 is 1021111111121.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1445198090 + ... + 1445281889.

Almost surely, 2^{121111111120100} is an apocalyptic number.

121111111120100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121111111120100 is an abundant number, since it is smaller than the sum of its proper divisors (142327234257100).

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

121111111120100 is a wasteful number, since it uses less digits than its factorization.

121111111120100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2890480412 (or 2890480405 counting only the distinct ones).

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

Adding to 121111111120100 its reverse (1021111111121), we get a palindrome (122132222231221).

The spelling of 121111111120100 in words is "one hundred twenty-one trillion, one hundred eleven billion, one hundred eleven million, one hundred twenty thousand, one hundred".