1112213131 has 4 divisors (see below), whose sum is σ = 1112531472. Its totient is φ = 1111894792.

The previous prime is 1112213129. The next prime is 1112213147. The reversal of 1112213131 is 1313122111.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1313122111 = 7 ⋅187588873.

It is a cyclic number.

It is not a de Polignac number, because 1112213131 - 2¹ = 1112213129 is a prime.

It is a super-2 number, since 2×1112213131² = 2474036097537646322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1112213161) 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, 153871 + ... + 160936.

It is an arithmetic number, because the mean of its divisors is an integer number (278132868).

Almost surely, 2^1112213131 is an apocalyptic number.

1112213131 is a deficient number, since it is larger than the sum of its proper divisors (318341).

1112213131 is an equidigital number, since it uses as much as digits as its factorization.

1112213131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318340.

The product of its digits is 36, while the sum is 16.

The square root of 1112213131 is about 33349.8595349366. The cubic root of 1112213131 is about 1036.0864787086.

Adding to 1112213131 its reverse (1313122111), we get a palindrome (2425335242).

The spelling of 1112213131 in words is "one billion, one hundred twelve million, two hundred thirteen thousand, one hundred thirty-one".