12870021012 has 48 divisors (see below), whose sum is σ = 31075833600. Its totient is φ = 4140707200.

The previous prime is 12870021007. The next prime is 12870021023. The reversal of 12870021012 is 21012007821.

It is a super-4 number, since 4×12870021012⁴ (a number of 42 digits) contains 4444 as substring.

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, 1917262 + ... + 1923962.

It is an arithmetic number, because the mean of its divisors is an integer number (647413200).

Almost surely, 2^12870021012 is an apocalyptic number.

12870021012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12870021012 is an abundant number, since it is smaller than the sum of its proper divisors (18205812588).

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

12870021012 is a wasteful number, since it uses less digits than its factorization.

12870021012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12256 (or 12254 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 24.

Adding to 12870021012 its reverse (21012007821), we get a palindrome (33882028833).

The spelling of 12870021012 in words is "twelve billion, eight hundred seventy million, twenty-one thousand, twelve".