1230011031 has 4 divisors (see below), whose sum is σ = 1640014712. Its totient is φ = 820007352.

The previous prime is 1230011023. The next prime is 1230011039. The reversal of 1230011031 is 1301100321.

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

It is an interprime number because it is at equal distance from previous prime (1230011023) and next prime (1230011039).

It is not a de Polignac number, because 1230011031 - 2³ = 1230011023 is a prime.

It is a super-2 number, since 2×1230011031² = 3025854272763365922, 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 = 1230010998 and 1230011016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1230011039) 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, 205001836 + ... + 205001841.

It is an arithmetic number, because the mean of its divisors is an integer number (410003678).

Almost surely, 2^1230011031 is an apocalyptic number.

1230011031 is a deficient number, since it is larger than the sum of its proper divisors (410003681).

1230011031 is an equidigital number, since it uses as much as digits as its factorization.

1230011031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410003680.

The product of its (nonzero) digits is 18, while the sum is 12.

The square root of 1230011031 is about 35071.5130982397. The cubic root of 1230011031 is about 1071.4444726808. Note that the first 4 decimals are identical.

Adding to 1230011031 its reverse (1301100321), we get a palindrome (2531111352).

The spelling of 1230011031 in words is "one billion, two hundred thirty million, eleven thousand, thirty-one".