1111213203131 has 4 divisors (see below), whose sum is σ = 1111383406200. Its totient is φ = 1111043000064.

The previous prime is 1111213203077. The next prime is 1111213203157. The reversal of 1111213203131 is 1313023121111.

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 1111213203131 - 2¹⁸ = 1111212940987 is a prime.

It is a super-2 number, since 2×1111213203131² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1111213203181) 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, 85091741 + ... + 85104798.

It is an arithmetic number, because the mean of its divisors is an integer number (277845851550).

Almost surely, 2^{1111213203131} is an apocalyptic number.

1111213203131 is a deficient number, since it is larger than the sum of its proper divisors (170203069).

1111213203131 is an equidigital number, since it uses as much as digits as its factorization.

1111213203131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170203068.

The product of its (nonzero) digits is 108, while the sum is 20.

Adding to 1111213203131 its reverse (1313023121111), we get a palindrome (2424236324242).

The spelling of 1111213203131 in words is "one trillion, one hundred eleven billion, two hundred thirteen million, two hundred three thousand, one hundred thirty-one".