1231303031331 has 32 divisors (see below), whose sum is σ = 1684863840000. Its totient is φ = 799419898368.

The previous prime is 1231303031303. The next prime is 1231303031333. The reversal of 1231303031331 is 1331303031321.

It is not a de Polignac number, because 1231303031331 - 2⁹ = 1231303030819 is a prime.

It is a super-2 number, since 2×1231303031331² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1231303031333) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 136066095 + ... + 136075143.

It is an arithmetic number, because the mean of its divisors is an integer number (52651995000).

Almost surely, 2^{1231303031331} is an apocalyptic number.

1231303031331 is a deficient number, since it is larger than the sum of its proper divisors (453560808669).

1231303031331 is a wasteful number, since it uses less digits than its factorization.

1231303031331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12083.

The product of its (nonzero) digits is 1458, while the sum is 24.

Adding to 1231303031331 its reverse (1331303031321), we get a palindrome (2562606062652).

The spelling of 1231303031331 in words is "one trillion, two hundred thirty-one billion, three hundred three million, thirty-one thousand, three hundred thirty-one".