12221033231 has 16 divisors (see below), whose sum is σ = 13796364960. Its totient is φ = 10723345920.

The previous prime is 12221033207. The next prime is 12221033243. The reversal of 12221033231 is 13233012221.

It is a cyclic number.

It is not a de Polignac number, because 12221033231 - 2²² = 12216838927 is a prime.

It is a super-2 number, since 2×12221033231² (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 (12221033261) 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, 1524971 + ... + 1532963.

It is an arithmetic number, because the mean of its divisors is an integer number (862272810).

Almost surely, 2^12221033231 is an apocalyptic number.

12221033231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12221033231 is a deficient number, since it is larger than the sum of its proper divisors (1575331729).

12221033231 is a wasteful number, since it uses less digits than its factorization.

12221033231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12826.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 12221033231 its reverse (13233012221), we get a palindrome (25454045452).

The spelling of 12221033231 in words is "twelve billion, two hundred twenty-one million, thirty-three thousand, two hundred thirty-one".