21330031222001 has 4 divisors (see below), whose sum is σ = 21537118903872. Its totient is φ = 21122943540132.

The previous prime is 21330031221943. The next prime is 21330031222013. The reversal of 21330031222001 is 10022213003312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21330031222001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21330031522001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103543840781 + ... + 103543840986.

It is an arithmetic number, because the mean of its divisors is an integer number (5384279725968).

Almost surely, 2^{21330031222001} is an apocalyptic number.

It is an amenable number.

21330031222001 is a deficient number, since it is larger than the sum of its proper divisors (207087681871).

21330031222001 is a wasteful number, since it uses less digits than its factorization.

21330031222001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207087681870.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21330031222001 its reverse (10022213003312), we get a palindrome (31352244225313).

The spelling of 21330031222001 in words is "twenty-one trillion, three hundred thirty billion, thirty-one million, two hundred twenty-two thousand, one".