1222331131 has 4 divisors (see below), whose sum is σ = 1396949872. Its totient is φ = 1047712392.

The previous prime is 1222331129. The next prime is 1222331171. The reversal of 1222331131 is 1311332221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1222331131 - 2¹ = 1222331129 is a prime.

It is a super-2 number, since 2×1222331131² = 2988186787623478322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1222331099 and 1222331108.

It is not an unprimeable number, because it can be changed into a prime (1222331171) 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, 87309360 + ... + 87309373.

It is an arithmetic number, because the mean of its divisors is an integer number (349237468).

Almost surely, 2^1222331131 is an apocalyptic number.

1222331131 is a deficient number, since it is larger than the sum of its proper divisors (174618741).

1222331131 is an equidigital number, since it uses as much as digits as its factorization.

1222331131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174618740.

The product of its digits is 216, while the sum is 19.

The square root of 1222331131 is about 34961.8525109869. The cubic root of 1222331131 is about 1069.2098662048.

Adding to 1222331131 its reverse (1311332221), we get a palindrome (2533663352).

The spelling of 1222331131 in words is "one billion, two hundred twenty-two million, three hundred thirty-one thousand, one hundred thirty-one".