21000131323201 has 8 divisors (see below), whose sum is σ = 21677614343424. Its totient is φ = 20322652017360.

The previous prime is 21000131323183. The next prime is 21000131323247. The reversal of 21000131323201 is 10232313100012.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21000131323201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21000131321201) 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, 14778990 + ... + 16137496.

It is an arithmetic number, because the mean of its divisors is an integer number (2709701792928).

Almost surely, 2^{21000131323201} is an apocalyptic number.

It is an amenable number.

21000131323201 is a deficient number, since it is larger than the sum of its proper divisors (677483020223).

21000131323201 is a wasteful number, since it uses less digits than its factorization.

21000131323201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1857191.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 21000131323201 its reverse (10232313100012), we get a palindrome (31232444423213).

The spelling of 21000131323201 in words is "twenty-one trillion, one hundred thirty-one million, three hundred twenty-three thousand, two hundred one".