22131210021 has 8 divisors (see below), whose sum is σ = 29881802880. Its totient is φ = 14567378592.

The previous prime is 22131210019. The next prime is 22131210043. The reversal of 22131210021 is 12001213122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 22131210021 - 2¹ = 22131210019 is a prime.

It is a super-2 number, since 2×22131210021² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22131210061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46690080 + ... + 46690553.

It is an arithmetic number, because the mean of its divisors is an integer number (3735225360).

Almost surely, 2^22131210021 is an apocalyptic number.

It is an amenable number.

22131210021 is a deficient number, since it is larger than the sum of its proper divisors (7750592859).

22131210021 is an equidigital number, since it uses as much as digits as its factorization.

22131210021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93380715.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 22131210021 its reverse (12001213122), we get a palindrome (34132423143).

The spelling of 22131210021 in words is "twenty-two billion, one hundred thirty-one million, two hundred ten thousand, twenty-one".