21331313122001 has 8 divisors (see below), whose sum is σ = 21420725832960. Its totient is φ = 21241901747808.

The previous prime is 21331313121973. The next prime is 21331313122013. The reversal of 21331313122001 is 10022131313312.

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 21331313122001 - 2²⁶ = 21331246013137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21331313122061) 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, 43869725 + ... + 44353301.

It is an arithmetic number, because the mean of its divisors is an integer number (2677590729120).

Almost surely, 2^{21331313122001} is an apocalyptic number.

It is an amenable number.

21331313122001 is a deficient number, since it is larger than the sum of its proper divisors (89412710959).

21331313122001 is a wasteful number, since it uses less digits than its factorization.

21331313122001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 668383.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 21331313122001 its reverse (10022131313312), we get a palindrome (31353444435313).

The spelling of 21331313122001 in words is "twenty-one trillion, three hundred thirty-one billion, three hundred thirteen million, one hundred twenty-two thousand, one".