1011131331 has 16 divisors (see below), whose sum is σ = 1541261568. Its totient is φ = 577605600.

The previous prime is 1011131323. The next prime is 1011131333. The reversal of 1011131331 is 1331311101.

It is not a de Polignac number, because 1011131331 - 2³ = 1011131323 is a prime.

It is a super-2 number, since 2×1011131331² = 2044773137059663122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1011131331.

It is not an unprimeable number, because it can be changed into a prime (1011131333) 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, 87396 + ... + 98286.

It is an arithmetic number, because the mean of its divisors is an integer number (96328848).

Almost surely, 2^1011131331 is an apocalyptic number.

1011131331 is a deficient number, since it is larger than the sum of its proper divisors (530130237).

1011131331 is a wasteful number, since it uses less digits than its factorization.

1011131331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15322.

The product of its (nonzero) digits is 27, while the sum is 15.

The square root of 1011131331 is about 31798.2913220192. The cubic root of 1011131331 is about 1003.6967607863.

Adding to 1011131331 its reverse (1331311101), we get a palindrome (2342442432).

The spelling of 1011131331 in words is "one billion, eleven million, one hundred thirty-one thousand, three hundred thirty-one".