1231323121310 has 32 divisors (see below), whose sum is σ = 2221067371392. Its totient is φ = 491488341760.

The previous prime is 1231323121271. The next prime is 1231323121351. The reversal of 1231323121310 is 131213231321.

It is a super-2 number, since 2×1231323121310² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30734612 + ... + 30774648.

It is an arithmetic number, because the mean of its divisors is an integer number (69408355356).

Almost surely, 2^{1231323121310} is an apocalyptic number.

1231323121310 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1231323121310 is a deficient number, since it is larger than the sum of its proper divisors (989744250082).

1231323121310 is a wasteful number, since it uses less digits than its factorization.

1231323121310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46468.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 1231323121310 its reverse (131213231321), we get a palindrome (1362536352631).

The spelling of 1231323121310 in words is "one trillion, two hundred thirty-one billion, three hundred twenty-three million, one hundred twenty-one thousand, three hundred ten".