21124530013080 has 64 divisors (see below), whose sum is σ = 68248481585760. Its totient is φ = 5199884310528.

The previous prime is 21124530013079. The next prime is 21124530013117. The reversal of 21124530013080 is 8031003542112.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 6770681137 + ... + 6770684256.

Almost surely, 2^{21124530013080} is an apocalyptic number.

21124530013080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21124530013080 is an abundant number, since it is smaller than the sum of its proper divisors (47123951572680).

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

21124530013080 is a wasteful number, since it uses less digits than its factorization.

21124530013080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13541365420 (or 13541365416 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 30.

Adding to 21124530013080 its reverse (8031003542112), we get a palindrome (29155533555192).

The spelling of 21124530013080 in words is "twenty-one trillion, one hundred twenty-four billion, five hundred thirty million, thirteen thousand, eighty".