22201022231 has 4 divisors (see below), whose sum is σ = 22233528072. Its totient is φ = 22168516392.

The previous prime is 22201022171. The next prime is 22201022237. The reversal of 22201022231 is 13222010222.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22201022231 is a prime.

It is a super-2 number, since 2×22201022231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22201022237) 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, 16251896 + ... + 16253261.

It is an arithmetic number, because the mean of its divisors is an integer number (5558382018).

Almost surely, 2^22201022231 is an apocalyptic number.

22201022231 is a deficient number, since it is larger than the sum of its proper divisors (32505841).

22201022231 is an equidigital number, since it uses as much as digits as its factorization.

22201022231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32505840.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 22201022231 its reverse (13222010222), we get a palindrome (35423032453).

The spelling of 22201022231 in words is "twenty-two billion, two hundred one million, twenty-two thousand, two hundred thirty-one".