21133322001 has 72 divisors (see below), whose sum is σ = 34927497696. Its totient is φ = 12210549120.

The previous prime is 21133321991. The next prime is 21133322009. The reversal of 21133322001 is 10022333112.

It is not a de Polignac number, because 21133322001 - 2²⁶ = 21066213137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21133322009) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 23933106 + ... + 23933988.

Almost surely, 2^21133322001 is an apocalyptic number.

It is an amenable number.

21133322001 is a deficient number, since it is larger than the sum of its proper divisors (13794175695).

21133322001 is a wasteful number, since it uses less digits than its factorization.

21133322001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1403 (or 1377 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 21133322001 its reverse (10022333112), we get a palindrome (31155655113).

The spelling of 21133322001 in words is "twenty-one billion, one hundred thirty-three million, three hundred twenty-two thousand, one".