13011223212 has 96 divisors (see below), whose sum is σ = 36787788800. Its totient is φ = 3952742976.

The previous prime is 13011223189. The next prime is 13011223217. The reversal of 13011223212 is 21232211031.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (13011223217) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 52263 + ... + 169569.

Almost surely, 2^13011223212 is an apocalyptic number.

13011223212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13011223212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18393894400).

13011223212 is an abundant number, since it is smaller than the sum of its proper divisors (23776565588).

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

13011223212 is a wasteful number, since it uses less digits than its factorization.

13011223212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117412 (or 117404 counting only the distinct ones).

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

Adding to 13011223212 its reverse (21232211031), we get a palindrome (34243434243).

The spelling of 13011223212 in words is "thirteen billion, eleven million, two hundred twenty-three thousand, two hundred twelve".