121032121156 has 48 divisors (see below), whose sum is σ = 222143201280. Its totient is φ = 57648719520.

The previous prime is 121032121139. The next prime is 121032121187. The reversal of 121032121156 is 651121230121.

It is a self number, because there is not a number n which added to its sum of digits gives 121032121156.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1241841 + ... + 1335751.

It is an arithmetic number, because the mean of its divisors is an integer number (4627983360).

Almost surely, 2^121032121156 is an apocalyptic number.

It is an amenable number.

121032121156 is a deficient number, since it is larger than the sum of its proper divisors (101111080124).

121032121156 is a wasteful number, since it uses less digits than its factorization.

121032121156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94144 (or 94142 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 25.

Adding to 121032121156 its reverse (651121230121), we get a palindrome (772153351277).

The spelling of 121032121156 in words is "one hundred twenty-one billion, thirty-two million, one hundred twenty-one thousand, one hundred fifty-six".