222120123131 has 4 divisors (see below), whose sum is σ = 223271004792. Its totient is φ = 220969241472.

The previous prime is 222120123097. The next prime is 222120123133. The reversal of 222120123131 is 131321021222.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 131321021222 = 2 ⋅65660510611.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-222120123131 is a prime.

It is a super-2 number, since 2×222120123131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222120123133) 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 in 3 ways as a sum of consecutive naturals, for example, 575440541 + ... + 575440926.

It is an arithmetic number, because the mean of its divisors is an integer number (55817751198).

Almost surely, 2^222120123131 is an apocalyptic number.

222120123131 is a deficient number, since it is larger than the sum of its proper divisors (1150881661).

222120123131 is a wasteful number, since it uses less digits than its factorization.

222120123131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1150881660.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 222120123131 its reverse (131321021222), we get a palindrome (353441144353).

The spelling of 222120123131 in words is "two hundred twenty-two billion, one hundred twenty million, one hundred twenty-three thousand, one hundred thirty-one".