11212233231 has 4 divisors (see below), whose sum is σ = 14949644312. Its totient is φ = 7474822152.

The previous prime is 11212233211. The next prime is 11212233259. The reversal of 11212233231 is 13233221211.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 11212233231 - 2¹⁵ = 11212200463 is a prime.

It is a super-2 number, since 2×11212233231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11212233198 and 11212233207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11212233211) 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, 1868705536 + ... + 1868705541.

It is an arithmetic number, because the mean of its divisors is an integer number (3737411078).

Almost surely, 2^11212233231 is an apocalyptic number.

11212233231 is a deficient number, since it is larger than the sum of its proper divisors (3737411081).

11212233231 is an equidigital number, since it uses as much as digits as its factorization.

11212233231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3737411080.

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

Adding to 11212233231 its reverse (13233221211), we get a palindrome (24445454442).

The spelling of 11212233231 in words is "eleven billion, two hundred twelve million, two hundred thirty-three thousand, two hundred thirty-one".