121101122100 has 144 divisors (see below), whose sum is σ = 411264038528. Its totient is φ = 26932124160.

The previous prime is 121101122099. The next prime is 121101122173. The reversal of 121101122100 is 1221101121.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 701587 + ... + 856986.

Almost surely, 2^121101122100 is an apocalyptic number.

121101122100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121101122100 is an abundant number, since it is smaller than the sum of its proper divisors (290162916428).

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

121101122100 is a wasteful number, since it uses less digits than its factorization.

121101122100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1558634 (or 1558627 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 121101122100 its reverse (1221101121), we get a palindrome (122322223221).

The spelling of 121101122100 in words is "one hundred twenty-one billion, one hundred one million, one hundred twenty-two thousand, one hundred".