1012131331 has 4 divisors (see below), whose sum is σ = 1024943200. Its totient is φ = 999319464.

The previous prime is 1012131319. The next prime is 1012131359. The reversal of 1012131331 is 1331312101.

1012131331 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1012131331 is a prime.

It is a super-2 number, since 2×1012131331² = 2048819662383663122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1012131391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6405816 + ... + 6405973.

It is an arithmetic number, because the mean of its divisors is an integer number (256235800).

Almost surely, 2^1012131331 is an apocalyptic number.

1012131331 is a deficient number, since it is larger than the sum of its proper divisors (12811869).

1012131331 is an equidigital number, since it uses as much as digits as its factorization.

1012131331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12811868.

The product of its (nonzero) digits is 54, while the sum is 16.

The square root of 1012131331 is about 31814.0115515161. The cubic root of 1012131331 is about 1004.0275341914.

Adding to 1012131331 its reverse (1331312101), we get a palindrome (2343443432).

The spelling of 1012131331 in words is "one billion, twelve million, one hundred thirty-one thousand, three hundred thirty-one".