222540123131 has 2 divisors, whose sum is σ = 222540123132. Its totient is φ = 222540123130.

The previous prime is 222540123073. The next prime is 222540123133. The reversal of 222540123131 is 131321045222.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 222540123131 - 2⁶ = 222540123067 is a prime.

It is a super-2 number, since 2×222540123131² (a number of 23 digits) contains 22 as substring.

Together with 222540123133, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 222540123131.

It is not a weakly prime, because it can be changed into another prime (222540123133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111270061565 + 111270061566.

It is an arithmetic number, because the mean of its divisors is an integer number (111270061566).

Almost surely, 2^222540123131 is an apocalyptic number.

222540123131 is a deficient number, since it is larger than the sum of its proper divisors (1).

222540123131 is an equidigital number, since it uses as much as digits as its factorization.

222540123131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 26.

Adding to 222540123131 its reverse (131321045222), we get a palindrome (353861168353).

The spelling of 222540123131 in words is "two hundred twenty-two billion, five hundred forty million, one hundred twenty-three thousand, one hundred thirty-one".