22131222230231 has 2 divisors, whose sum is σ = 22131222230232. Its totient is φ = 22131222230230.

The previous prime is 22131222230197. The next prime is 22131222230237. The reversal of 22131222230231 is 13203222213122.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22131222230231 is a prime.

It is a super-2 number, since 2×22131222230231² (a number of 27 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22131222230231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22131222230237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11065611115115 + 11065611115116.

It is an arithmetic number, because the mean of its divisors is an integer number (11065611115116).

Almost surely, 2^{22131222230231} is an apocalyptic number.

22131222230231 is a deficient number, since it is larger than the sum of its proper divisors (1).

22131222230231 is an equidigital number, since it uses as much as digits as its factorization.

22131222230231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 22131222230231 its reverse (13203222213122), we get a palindrome (35334444443353).

The spelling of 22131222230231 in words is "twenty-two trillion, one hundred thirty-one billion, two hundred twenty-two million, two hundred thirty thousand, two hundred thirty-one".