21233022001 has 4 divisors (see below), whose sum is σ = 21234812400. Its totient is φ = 21231231604.

The previous prime is 21233021989. The next prime is 21233022007. The reversal of 21233022001 is 10022033212.

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 not a de Polignac number, because 21233022001 - 2⁵ = 21233021969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21233022007) 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, 877291 + ... + 901168.

It is an arithmetic number, because the mean of its divisors is an integer number (5308703100).

Almost surely, 2^21233022001 is an apocalyptic number.

It is an amenable number.

21233022001 is a deficient number, since it is larger than the sum of its proper divisors (1790399).

21233022001 is a wasteful number, since it uses less digits than its factorization.

21233022001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1790398.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 21233022001 its reverse (10022033212), we get a palindrome (31255055213).

The spelling of 21233022001 in words is "twenty-one billion, two hundred thirty-three million, twenty-two thousand, one".