13224031212 has 72 divisors (see below), whose sum is σ = 37051714560. Its totient is φ = 3656409120.

The previous prime is 13224031211. The next prime is 13224031241. The reversal of 13224031212 is 21213042231.

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 (13224031211) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 344512 + ... + 380967.

Almost surely, 2^13224031212 is an apocalyptic number.

13224031212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

13224031212 is an abundant number, since it is smaller than the sum of its proper divisors (23827683348).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13224031212 is a wasteful number, since it uses less digits than its factorization.

13224031212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 725531 (or 725522 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 13224031212 its reverse (21213042231), we get a palindrome (34437073443).

The spelling of 13224031212 in words is "thirteen billion, two hundred twenty-four million, thirty-one thousand, two hundred twelve".