12157217020 has 48 divisors (see below), whose sum is σ = 28442100960. Its totient is φ = 4334029056.

The previous prime is 12157217003. The next prime is 12157217047. The reversal of 12157217020 is 2071275121.

It is a self number, because there is not a number n which added to its sum of digits gives 12157217020.

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, 798642 + ... + 813721.

It is an arithmetic number, because the mean of its divisors is an integer number (592543770).

Almost surely, 2^12157217020 is an apocalyptic number.

12157217020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12157217020 is an abundant number, since it is smaller than the sum of its proper divisors (16284883940).

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

12157217020 is a wasteful number, since it uses less digits than its factorization.

12157217020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1612414 (or 1612412 counting only the distinct ones).

The product of its (nonzero) digits is 1960, while the sum is 28.

The spelling of 12157217020 in words is "twelve billion, one hundred fifty-seven million, two hundred seventeen thousand, twenty".