1020113131 has 4 divisors (see below), whose sum is σ = 1020744064. Its totient is φ = 1019482200.

The previous prime is 1020113111. The next prime is 1020113141. The reversal of 1020113131 is 1313110201.

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

It is a cyclic number.

It is not a de Polignac number, because 1020113131 - 2⁵ = 1020113099 is a prime.

It is a super-2 number, since 2×1020113131² = 2081261600077246322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1020113111) 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, 313035 + ... + 316276.

It is an arithmetic number, because the mean of its divisors is an integer number (255186016).

Almost surely, 2^1020113131 is an apocalyptic number.

1020113131 is a deficient number, since it is larger than the sum of its proper divisors (630933).

1020113131 is an equidigital number, since it uses as much as digits as its factorization.

1020113131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 630932.

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 1020113131 is about 31939.2099307419. The cubic root of 1020113131 is about 1006.6599239470.

Adding to 1020113131 its reverse (1313110201), we get a palindrome (2333223332).

It can be divided in two parts, 10201 and 13131, that multiplied together give a palindrome (133949331).

The spelling of 1020113131 in words is "one billion, twenty million, one hundred thirteen thousand, one hundred thirty-one".