22121312020231 has 4 divisors (see below), whose sum is σ = 22201172352712. Its totient is φ = 22041451687752.

The previous prime is 22121312020219. The next prime is 22121312020307. The reversal of 22121312020231 is 13202021312122.

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-22121312020231 is a prime.

It is a super-2 number, since 2×22121312020231² (a number of 27 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 (22121342020231) 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, 39930165825 + ... + 39930166378.

It is an arithmetic number, because the mean of its divisors is an integer number (5550293088178).

Almost surely, 2^{22121312020231} is an apocalyptic number.

22121312020231 is a deficient number, since it is larger than the sum of its proper divisors (79860332481).

22121312020231 is an equidigital number, since it uses as much as digits as its factorization.

22121312020231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79860332480.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 22121312020231 its reverse (13202021312122), we get a palindrome (35323333332353).

The spelling of 22121312020231 in words is "twenty-two trillion, one hundred twenty-one billion, three hundred twelve million, twenty thousand, two hundred thirty-one".