121534151156 has 96 divisors (see below), whose sum is σ = 240878534400. Its totient is φ = 53169177600.

The previous prime is 121534151131. The next prime is 121534151177. The reversal of 121534151156 is 651151435121.

It is a super-2 number, since 2×121534151156² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 68161841 + ... + 68163623.

It is an arithmetic number, because the mean of its divisors is an integer number (2509151400).

Almost surely, 2^121534151156 is an apocalyptic number.

It is an amenable number.

121534151156 is a deficient number, since it is larger than the sum of its proper divisors (119344383244).

121534151156 is a wasteful number, since it uses less digits than its factorization.

121534151156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2265 (or 2263 counting only the distinct ones).

The product of its digits is 18000, while the sum is 35.

Adding to 121534151156 its reverse (651151435121), we get a palindrome (772685586277).

The spelling of 121534151156 in words is "one hundred twenty-one billion, five hundred thirty-four million, one hundred fifty-one thousand, one hundred fifty-six".