1011113203131 has 20 divisors (see below), whose sum is σ = 1599277094712. Its totient is φ = 634423969728.

The previous prime is 1011113203127. The next prime is 1011113203147. The reversal of 1011113203131 is 1313023111101.

1011113203131 is a `hidden beast` number, since 10 + 11 + 11 + 320 + 313 + 1 = 666.

It is not a de Polignac number, because 1011113203131 - 2² = 1011113203127 is a prime.

It is a super-2 number, since 2×1011113203131² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1011113203151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 367142125 + ... + 367144878.

Almost surely, 2^{1011113203131} is an apocalyptic number.

1011113203131 is a deficient number, since it is larger than the sum of its proper divisors (588163891581).

1011113203131 is an equidigital number, since it uses as much as digits as its factorization.

1011113203131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 734287032 (or 734287023 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 18.

Adding to 1011113203131 its reverse (1313023111101), we get a palindrome (2324136314232).

The spelling of 1011113203131 in words is "one trillion, eleven billion, one hundred thirteen million, two hundred three thousand, one hundred thirty-one".