13201231212 has 36 divisors (see below), whose sum is σ = 35936686240. Its totient is φ = 4061917152.

The previous prime is 13201231207. The next prime is 13201231223. The reversal of 13201231212 is 21213210231.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14103412 + ... + 14104347.

Almost surely, 2^13201231212 is an apocalyptic number.

13201231212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

13201231212 is an abundant number, since it is smaller than the sum of its proper divisors (22735455028).

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

13201231212 is a wasteful number, since it uses less digits than its factorization.

13201231212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28207782 (or 28207777 counting only the distinct ones).

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

Adding to 13201231212 its reverse (21213210231), we get a palindrome (34414441443).

The spelling of 13201231212 in words is "thirteen billion, two hundred one million, two hundred thirty-one thousand, two hundred twelve".