1331231210231 has 16 divisors (see below), whose sum is σ = 1444955820000. Its totient is φ = 1219147832448.

The previous prime is 1331231210227. The next prime is 1331231210261. The reversal of 1331231210231 is 1320121321331.

It is not a de Polignac number, because 1331231210231 - 2² = 1331231210227 is a prime.

It is a super-2 number, since 2×1331231210231² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1331231210197 and 1331231210206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331231210201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 850145 + ... + 1839893.

It is an arithmetic number, because the mean of its divisors is an integer number (90309738750).

Almost surely, 2^{1331231210231} is an apocalyptic number.

1331231210231 is a deficient number, since it is larger than the sum of its proper divisors (113724609769).

1331231210231 is a wasteful number, since it uses less digits than its factorization.

1331231210231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 990578.

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

Adding to 1331231210231 its reverse (1320121321331), we get a palindrome (2651352531562).

The spelling of 1331231210231 in words is "one trillion, three hundred thirty-one billion, two hundred thirty-one million, two hundred ten thousand, two hundred thirty-one".