121552261020 has 36 divisors (see below), whose sum is σ = 368708525640. Its totient is φ = 32413936224.

The previous prime is 121552261003. The next prime is 121552261031. The reversal of 121552261020 is 20162255121.

121552261020 is a `hidden beast` number, since 1 + 2 + 1 + 5 + 5 + 22 + 610 + 20 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-3 number, since 3×121552261020³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 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, 337644990 + ... + 337645349.

It is an arithmetic number, because the mean of its divisors is an integer number (10241903490).

Almost surely, 2^121552261020 is an apocalyptic number.

121552261020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121552261020 is an abundant number, since it is smaller than the sum of its proper divisors (247156264620).

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

121552261020 is a wasteful number, since it uses less digits than its factorization.

121552261020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 675290354 (or 675290349 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The spelling of 121552261020 in words is "one hundred twenty-one billion, five hundred fifty-two million, two hundred sixty-one thousand, twenty".