22012120331 has 4 divisors (see below), whose sum is σ = 23170653000. Its totient is φ = 20853587664.

The previous prime is 22012120309. The next prime is 22012120349. The reversal of 22012120331 is 13302121022.

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

It is a cyclic number.

It is not a de Polignac number, because 22012120331 - 2¹⁰ = 22012119307 is a prime.

It is a super-2 number, since 2×22012120331² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22012120381) 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, 579266306 + ... + 579266343.

It is an arithmetic number, because the mean of its divisors is an integer number (5792663250).

Almost surely, 2^22012120331 is an apocalyptic number.

22012120331 is a deficient number, since it is larger than the sum of its proper divisors (1158532669).

22012120331 is a wasteful number, since it uses less digits than its factorization.

22012120331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1158532668.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 22012120331 its reverse (13302121022), we get a palindrome (35314241353).

The spelling of 22012120331 in words is "twenty-two billion, twelve million, one hundred twenty thousand, three hundred thirty-one".