2139077172321 has 6 divisors (see below), whose sum is σ = 3089778137810. Its totient is φ = 1426051448208.

The previous prime is 2139077172283. The next prime is 2139077172343. The reversal of 2139077172321 is 1232717709312.

2139077172321 is a `hidden beast` number, since 2 + 1 + 3 + 90 + 77 + 172 + 321 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2128940709921 + 10136462400 = 1459089^2 + 100680^2 .

It is not a de Polignac number, because 2139077172321 - 2²⁹ = 2138540301409 is a prime.

It is a super-2 number, since 2×2139077172321² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2139077171321) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 118837620676 + ... + 118837620693.

Almost surely, 2^{2139077172321} is an apocalyptic number.

It is an amenable number.

2139077172321 is a deficient number, since it is larger than the sum of its proper divisors (950700965489).

2139077172321 is a wasteful number, since it uses less digits than its factorization.

2139077172321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237675241375 (or 237675241372 counting only the distinct ones).

The product of its (nonzero) digits is 222264, while the sum is 45.

The spelling of 2139077172321 in words is "two trillion, one hundred thirty-nine billion, seventy-seven million, one hundred seventy-two thousand, three hundred twenty-one".