11312002231 has 4 divisors (see below), whose sum is σ = 11312345464. Its totient is φ = 11311659000.

The previous prime is 11312002201. The next prime is 11312002237. The reversal of 11312002231 is 13220021311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13220021311 = 7 ⋅1888574473.

It is a cyclic number.

It is not a de Polignac number, because 11312002231 - 2⁷ = 11312002103 is a prime.

It is a super-2 number, since 2×11312002231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11312002237) 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, 116220 + ... + 190081.

It is an arithmetic number, because the mean of its divisors is an integer number (2828086366).

Almost surely, 2^11312002231 is an apocalyptic number.

11312002231 is a deficient number, since it is larger than the sum of its proper divisors (343233).

11312002231 is an equidigital number, since it uses as much as digits as its factorization.

11312002231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343232.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 11312002231 its reverse (13220021311), we get a palindrome (24532023542).

The spelling of 11312002231 in words is "eleven billion, three hundred twelve million, two thousand, two hundred thirty-one".