1231312210 has 32 divisors (see below), whose sum is σ = 2370004272. Its totient is φ = 458956800.

The previous prime is 1231312183. The next prime is 1231312211. The reversal of 1231312210 is 122131321.

It can be written as a sum of positive squares in 8 ways, for example, as 907636129 + 323676081 = 30127^2 + 17991^2 .

It is a super-2 number, since 2×1231312210² = 3032259516990168200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1231312211) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 18687 + ... + 53026.

Almost surely, 2^1231312210 is an apocalyptic number.

1231312210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1231312210 is a deficient number, since it is larger than the sum of its proper divisors (1138692062).

1231312210 is a wasteful number, since it uses less digits than its factorization.

1231312210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71838.

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

The square root of 1231312210 is about 35090.0585636445. The cubic root of 1231312210 is about 1071.8221521485.

Adding to 1231312210 its reverse (122131321), we get a palindrome (1353443531).

The spelling of 1231312210 in words is "one billion, two hundred thirty-one million, three hundred twelve thousand, two hundred ten".