121012133100 has 72 divisors (see below), whose sum is σ = 350414394960. Its totient is φ = 32243546880.

The previous prime is 121012133089. The next prime is 121012133113. The reversal of 121012133100 is 1331210121.

It is a happy number.

It is a super-2 number, since 2×121012133100² (a number of 23 digits) contains 22 as substring.

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 121012133100.

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 23 ways as a sum of consecutive naturals, for example, 204594 + ... + 532806.

Almost surely, 2^121012133100 is an apocalyptic number.

121012133100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121012133100 is an abundant number, since it is smaller than the sum of its proper divisors (229402261860).

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

121012133100 is a wasteful number, since it uses less digits than its factorization.

121012133100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329459 (or 329452 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 121012133100 its reverse (1331210121), we get a palindrome (122343343221).

The spelling of 121012133100 in words is "one hundred twenty-one billion, twelve million, one hundred thirty-three thousand, one hundred".