12231220113 has 72 divisors (see below), whose sum is σ = 21765481920. Its totient is φ = 6581010240.

The previous prime is 12231220103. The next prime is 12231220139. The reversal of 12231220113 is 31102213221.

It is not a de Polignac number, because 12231220113 - 2¹⁰ = 12231219089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12231220103) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1394923 + ... + 1403663.

It is an arithmetic number, because the mean of its divisors is an integer number (302298360).

Almost surely, 2^12231220113 is an apocalyptic number.

It is an amenable number.

12231220113 is a deficient number, since it is larger than the sum of its proper divisors (9534261807).

12231220113 is a wasteful number, since it uses less digits than its factorization.

12231220113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8947 (or 8937 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 12231220113 its reverse (31102213221), we get a palindrome (43333433334).

The spelling of 12231220113 in words is "twelve billion, two hundred thirty-one million, two hundred twenty thousand, one hundred thirteen".