100520438212 has 12 divisors (see below), whose sum is σ = 175913866156. Its totient is φ = 50259333600.

The previous prime is 100520438209. The next prime is 100520438309. The reversal of 100520438212 is 212834025001.

It can be written as a sum of positive squares in 2 ways, for example, as 67967618436 + 32552819776 = 260706^2 + 180424^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79462 + ... + 455362.

Almost surely, 2^100520438212 is an apocalyptic number.

It is an amenable number.

100520438212 is a deficient number, since it is larger than the sum of its proper divisors (75393427944).

100520438212 is a wasteful number, since it uses less digits than its factorization.

100520438212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 442758 (or 442756 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The spelling of 100520438212 in words is "one hundred billion, five hundred twenty million, four hundred thirty-eight thousand, two hundred twelve".