21515050414124 has 6 divisors (see below), whose sum is σ = 37651338224724. Its totient is φ = 10757525207060.

The previous prime is 21515050414111. The next prime is 21515050414201. The reversal of 21515050414124 is 42141405051512.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2689381301762 + ... + 2689381301769.

It is an arithmetic number, because the mean of its divisors is an integer number (6275223037454).

Almost surely, 2^{21515050414124} is an apocalyptic number.

It is an amenable number.

21515050414124 is a deficient number, since it is larger than the sum of its proper divisors (16136287810600).

21515050414124 is a wasteful number, since it uses less digits than its factorization.

21515050414124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5378762603535 (or 5378762603533 counting only the distinct ones).

The product of its (nonzero) digits is 32000, while the sum is 35.

Adding to 21515050414124 its reverse (42141405051512), we get a palindrome (63656455465636).

The spelling of 21515050414124 in words is "twenty-one trillion, five hundred fifteen billion, fifty million, four hundred fourteen thousand, one hundred twenty-four".