121123112100 has 36 divisors (see below), whose sum is σ = 350449538544. Its totient is φ = 32299496480.

The previous prime is 121123112093. The next prime is 121123112137. The reversal of 121123112100 is 1211321121.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 121123112100.

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, 201871554 + ... + 201872153.

It is an arithmetic number, because the mean of its divisors is an integer number (9734709404).

Almost surely, 2^121123112100 is an apocalyptic number.

121123112100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121123112100 is an abundant number, since it is smaller than the sum of its proper divisors (229326426444).

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

121123112100 is a wasteful number, since it uses less digits than its factorization.

121123112100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403743724 (or 403743717 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 121123112100 its reverse (1211321121), we get a palindrome (122334433221).

The spelling of 121123112100 in words is "one hundred twenty-one billion, one hundred twenty-three million, one hundred twelve thousand, one hundred".