1213133031 has 24 divisors (see below), whose sum is σ = 1982408064. Its totient is φ = 735230520.

The previous prime is 1213133029. The next prime is 1213133041. The reversal of 1213133031 is 1303313121.

It is a happy number.

It is not a de Polignac number, because 1213133031 - 2¹ = 1213133029 is a prime.

It is a super-2 number, since 2×1213133031² = 2943383501806493922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1213132995 and 1213133013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213133041) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 224251 + ... + 229596.

It is an arithmetic number, because the mean of its divisors is an integer number (82600336).

Almost surely, 2^1213133031 is an apocalyptic number.

1213133031 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1213133031 is a deficient number, since it is larger than the sum of its proper divisors (769275033).

1213133031 is an equidigital number, since it uses as much as digits as its factorization.

1213133031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 453873 (or 453861 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

The square root of 1213133031 is about 34830.0593022751. The cubic root of 1213133031 is about 1066.5211589386.

Adding to 1213133031 its reverse (1303313121), we get a palindrome (2516446152).

The spelling of 1213133031 in words is "one billion, two hundred thirteen million, one hundred thirty-three thousand, thirty-one".