121751527156 has 36 divisors (see below), whose sum is σ = 248561638500. Its totient is φ = 52029686016.

The previous prime is 121751527099. The next prime is 121751527171. The reversal of 121751527156 is 651725157121.

It can be written as a sum of positive squares in 2 ways, for example, as 68429328100 + 53322199056 = 261590^2 + 230916^2 .

It is a congruent number.

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, 821541 + ... + 958348.

Almost surely, 2^121751527156 is an apocalyptic number.

It is an amenable number.

121751527156 is an abundant number, since it is smaller than the sum of its proper divisors (126810111344).

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

121751527156 is a wasteful number, since it uses less digits than its factorization.

121751527156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1780256 (or 1780247 counting only the distinct ones).

The product of its digits is 147000, while the sum is 43.

The spelling of 121751527156 in words is "one hundred twenty-one billion, seven hundred fifty-one million, five hundred twenty-seven thousand, one hundred fifty-six".