1213111032331 has 24 divisors (see below), whose sum is σ = 1354811533040. Its totient is φ = 1085205496320.

The previous prime is 1213111032317. The next prime is 1213111032373. The reversal of 1213111032331 is 1332301113121.

It is not a de Polignac number, because 1213111032331 - 2⁹ = 1213111031819 is a prime.

It is a super-2 number, since 2×1213111032331² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1213111032131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3666100 + ... + 3983278.

Almost surely, 2^{1213111032331} is an apocalyptic number.

1213111032331 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1213111032331 is a deficient number, since it is larger than the sum of its proper divisors (141700500709).

1213111032331 is a wasteful number, since it uses less digits than its factorization.

1213111032331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317707 (or 317696 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 22.

Adding to 1213111032331 its reverse (1332301113121), we get a palindrome (2545412145452).

The spelling of 1213111032331 in words is "one trillion, two hundred thirteen billion, one hundred eleven million, thirty-two thousand, three hundred thirty-one".