21056022139001 has 8 divisors (see below), whose sum is σ = 21076746561024. Its totient is φ = 21035298303360.

The previous prime is 21056022138997. The next prime is 21056022139027. The reversal of 21056022139001 is 10093122065012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21056022139001 - 2² = 21056022138997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21056022133001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 119308841 + ... + 119485193.

It is an arithmetic number, because the mean of its divisors is an integer number (2634593320128).

Almost surely, 2^{21056022139001} is an apocalyptic number.

It is an amenable number.

21056022139001 is a deficient number, since it is larger than the sum of its proper divisors (20724422023).

21056022139001 is a wasteful number, since it uses less digits than its factorization.

21056022139001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293191.

The product of its (nonzero) digits is 6480, while the sum is 32.

The spelling of 21056022139001 in words is "twenty-one trillion, fifty-six billion, twenty-two million, one hundred thirty-nine thousand, one".