21550320325124 has 24 divisors (see below), whose sum is σ = 37801756755000. Its totient is φ = 10749824368640.

The previous prime is 21550320325111. The next prime is 21550320325189. The reversal of 21550320325124 is 42152302305512.

It can be written as a sum of positive squares in 4 ways, for example, as 78866612224 + 21471453712900 = 280832^2 + 4633730^2 .

It is a super-2 number, since 2×21550320325124² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13771052 + ... + 15255900.

It is an arithmetic number, because the mean of its divisors is an integer number (1575073198125).

Almost surely, 2^{21550320325124} is an apocalyptic number.

It is an amenable number.

21550320325124 is a deficient number, since it is larger than the sum of its proper divisors (16251436429876).

21550320325124 is a wasteful number, since it uses less digits than its factorization.

21550320325124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1493383 (or 1493381 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 35.

The spelling of 21550320325124 in words is "twenty-one trillion, five hundred fifty billion, three hundred twenty million, three hundred twenty-five thousand, one hundred twenty-four".