22001222001 has 24 divisors (see below), whose sum is σ = 32252551072. Its totient is φ = 13330627200.

The previous prime is 22001221997. The next prime is 22001222003. The reversal of 22001222001 is 10022210022.

It is not a de Polignac number, because 22001222001 - 2² = 22001221997 is a prime.

It is a super-3 number, since 3×22001222001³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22001222003) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2522490 + ... + 2531196.

Almost surely, 2^22001222001 is an apocalyptic number.

It is an amenable number.

22001222001 is a deficient number, since it is larger than the sum of its proper divisors (10251329071).

22001222001 is a wasteful number, since it uses less digits than its factorization.

22001222001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15693 (or 15682 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 22001222001 its reverse (10022210022), we get a palindrome (32023432023).

The spelling of 22001222001 in words is "twenty-two billion, one million, two hundred twenty-two thousand, one".