22121302231 has 12 divisors (see below), whose sum is σ = 25363304112. Its totient is φ = 18899951616.

The previous prime is 22121302223. The next prime is 22121302253. The reversal of 22121302231 is 13220312122.

It is not a de Polignac number, because 22121302231 - 2³ = 22121302223 is a prime.

It is a super-2 number, since 2×22121302231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22121302199 and 22121302208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22121302271) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 669655 + ... + 701911.

It is an arithmetic number, because the mean of its divisors is an integer number (2113608676).

Almost surely, 2^22121302231 is an apocalyptic number.

22121302231 is a deficient number, since it is larger than the sum of its proper divisors (3242001881).

22121302231 is an frugal number, since it uses more digits than its factorization.

22121302231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32890 (or 32577 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 22121302231 its reverse (13220312122), we get a palindrome (35341614353).

The spelling of 22121302231 in words is "twenty-two billion, one hundred twenty-one million, three hundred two thousand, two hundred thirty-one".