22121202431 has 2 divisors, whose sum is σ = 22121202432. Its totient is φ = 22121202430.

The previous prime is 22121202377. The next prime is 22121202463. The reversal of 22121202431 is 13420212122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22121202431 - 2³⁰ = 21047460607 is a prime.

It is a super-2 number, since 2×22121202431² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22121202491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11060601215 + 11060601216.

It is an arithmetic number, because the mean of its divisors is an integer number (11060601216).

Almost surely, 2^22121202431 is an apocalyptic number.

22121202431 is a deficient number, since it is larger than the sum of its proper divisors (1).

22121202431 is an equidigital number, since it uses as much as digits as its factorization.

22121202431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 22121202431 its reverse (13420212122), we get a palindrome (35541414553).

The spelling of 22121202431 in words is "twenty-two billion, one hundred twenty-one million, two hundred two thousand, four hundred thirty-one".