121701924828 has 72 divisors (see below), whose sum is σ = 350193707136. Its totient is φ = 35275917600.

The previous prime is 121701924809. The next prime is 121701924829. The reversal of 121701924828 is 828429107121.

121701924828 is a `hidden beast` number, since 12 + 1 + 70 + 1 + 92 + 482 + 8 = 666.

It is a super-2 number, since 2×121701924828² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121701924829) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6671938 + ... + 6690153.

It is an arithmetic number, because the mean of its divisors is an integer number (4863801488).

Almost surely, 2^121701924828 is an apocalyptic number.

121701924828 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

121701924828 is an abundant number, since it is smaller than the sum of its proper divisors (228491782308).

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

121701924828 is a wasteful number, since it uses less digits than its factorization.

121701924828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13362135 (or 13362130 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 45.

It can be divided in two parts, 121701 and 924828, that added together give a square (1046529 = 1023²).

The spelling of 121701924828 in words is "one hundred twenty-one billion, seven hundred one million, nine hundred twenty-four thousand, eight hundred twenty-eight".