1310111231 has 16 divisors (see below), whose sum is σ = 1544060448. Its totient is φ = 1095888000.

The previous prime is 1310111227. The next prime is 1310111249. The reversal of 1310111231 is 1321110131.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1310111231 - 2² = 1310111227 is a prime.

It is a super-2 number, since 2×1310111231² = 3432782875184670722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1310111251) 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, 30881 + ... + 59781.

It is an arithmetic number, because the mean of its divisors is an integer number (96503778).

Almost surely, 2^1310111231 is an apocalyptic number.

1310111231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1310111231 is a deficient number, since it is larger than the sum of its proper divisors (233949217).

1310111231 is a wasteful number, since it uses less digits than its factorization.

1310111231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29242.

The product of its (nonzero) digits is 18, while the sum is 14.

The square root of 1310111231 is about 36195.4587068599. The cubic root of 1310111231 is about 1094.2151492404.

Adding to 1310111231 its reverse (1321110131), we get a palindrome (2631221362).

The spelling of 1310111231 in words is "one billion, three hundred ten million, one hundred eleven thousand, two hundred thirty-one".