22001000012001 has 12 divisors (see below), whose sum is σ = 31789269458128. Its totient is φ = 14662696163544.

The previous prime is 22001000011979. The next prime is 22001000012003. The reversal of 22001000012001 is 10021000010022.

It is not a de Polignac number, because 22001000012001 - 2⁶ = 22001000011937 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22001000012003) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 386401435 + ... + 386458368.

Almost surely, 2^{22001000012001} is an apocalyptic number.

It is an amenable number.

22001000012001 is a deficient number, since it is larger than the sum of its proper divisors (9788269446127).

22001000012001 is a wasteful number, since it uses less digits than its factorization.

22001000012001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 772862972 (or 772862969 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 22001000012001 its reverse (10021000010022), we get a palindrome (32022000022023).

The spelling of 22001000012001 in words is "twenty-two trillion, one billion, twelve thousand, one".