1222113131 has 8 divisors (see below), whose sum is σ = 1242540000. Its totient is φ = 1201775680.

The previous prime is 1222113127. The next prime is 1222113133. The reversal of 1222113131 is 1313112221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1222113131 - 2² = 1222113127 is a prime.

It is a super-2 number, since 2×1222113131² = 2987121009925246322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1222113133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5495 + ... + 49743.

It is an arithmetic number, because the mean of its divisors is an integer number (155317500).

Almost surely, 2^1222113131 is an apocalyptic number.

1222113131 is a deficient number, since it is larger than the sum of its proper divisors (20426869).

1222113131 is an equidigital number, since it uses as much as digits as its factorization.

1222113131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44709.

The product of its digits is 72, while the sum is 17.

The square root of 1222113131 is about 34958.7346882006. The cubic root of 1222113131 is about 1069.1462987030.

Adding to 1222113131 its reverse (1313112221), we get a palindrome (2535225352).

It can be divided in two parts, 12221 and 13131, that added together give a palindrome (25352).

The spelling of 1222113131 in words is "one billion, two hundred twenty-two million, one hundred thirteen thousand, one hundred thirty-one".