1231311022 has 8 divisors (see below), whose sum is σ = 1848112200. Its totient is φ = 615273624.

The previous prime is 1231311019. The next prime is 1231311073. The reversal of 1231311022 is 2201131321.

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

It is a super-2 number, since 2×1231311022² = 3032253665797368968, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1231310987 and 1231311005.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 186897 + ... + 193372.

It is an arithmetic number, because the mean of its divisors is an integer number (231014025).

Almost surely, 2^1231311022 is an apocalyptic number.

1231311022 is a deficient number, since it is larger than the sum of its proper divisors (616801178).

1231311022 is a wasteful number, since it uses less digits than its factorization.

1231311022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381890.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1231311022 is about 35090.0416357690. The cubic root of 1231311022 is about 1071.8218074417.

Adding to 1231311022 its reverse (2201131321), we get a palindrome (3432442343).

The spelling of 1231311022 in words is "one billion, two hundred thirty-one million, three hundred eleven thousand, twenty-two".