121235510552 has 64 divisors (see below), whose sum is σ = 250869800160. Its totient is φ = 54569088000.

The previous prime is 121235510527. The next prime is 121235510567. The reversal of 121235510552 is 255015532121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18088802 + ... + 18095502.

Almost surely, 2^121235510552 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121235510552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (125434900080).

121235510552 is an abundant number, since it is smaller than the sum of its proper divisors (129634289608).

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

121235510552 is a wasteful number, since it uses less digits than its factorization.

121235510552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11004 (or 11000 counting only the distinct ones).

The product of its (nonzero) digits is 15000, while the sum is 32.

The spelling of 121235510552 in words is "one hundred twenty-one billion, two hundred thirty-five million, five hundred ten thousand, five hundred fifty-two".