11312212233 has 16 divisors (see below), whose sum is σ = 18251637120. Its totient is φ = 6083878656.

The previous prime is 11312212217. The next prime is 11312212259. The reversal of 11312212233 is 33221221311.

It is not a de Polignac number, because 11312212233 - 2⁴ = 11312212217 is a prime.

It is a super-2 number, since 2×11312212233² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (11312212333) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15843078 + ... + 15843791.

It is an arithmetic number, because the mean of its divisors is an integer number (1140727320).

Almost surely, 2^11312212233 is an apocalyptic number.

It is an amenable number.

11312212233 is a deficient number, since it is larger than the sum of its proper divisors (6939424887).

11312212233 is a wasteful number, since it uses less digits than its factorization.

11312212233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31686896.

The product of its digits is 432, while the sum is 21.

Adding to 11312212233 its reverse (33221221311), we get a palindrome (44533433544).

The spelling of 11312212233 in words is "eleven billion, three hundred twelve million, two hundred twelve thousand, two hundred thirty-three".