22012213031 has 4 divisors (see below), whose sum is σ = 22340753592. Its totient is φ = 21683672472.

The previous prime is 22012212973. The next prime is 22012213039. The reversal of 22012213031 is 13031221022.

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-22012213031 is a prime.

It is a super-2 number, since 2×22012213031² (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 (22012213039) 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, 164270180 + ... + 164270313.

It is an arithmetic number, because the mean of its divisors is an integer number (5585188398).

Almost surely, 2^22012213031 is an apocalyptic number.

22012213031 is a deficient number, since it is larger than the sum of its proper divisors (328540561).

22012213031 is an equidigital number, since it uses as much as digits as its factorization.

22012213031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328540560.

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

Adding to 22012213031 its reverse (13031221022), we get a palindrome (35043434053).

The spelling of 22012213031 in words is "twenty-two billion, twelve million, two hundred thirteen thousand, thirty-one".