13221301212 has 72 divisors (see below), whose sum is σ = 38210800992. Its totient is φ = 3775939200.

The previous prime is 13221301199. The next prime is 13221301213. The reversal of 13221301212 is 21210312231.

13221301212 is a `hidden beast` number, since 1 + 322 + 130 + 1 + 212 = 666.

It is a super-3 number, since 3×13221301212³ (a number of 31 digits) contains 333 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13221301213) 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, 681162 + ... + 700302.

Almost surely, 2^13221301212 is an apocalyptic number.

13221301212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

13221301212 is an abundant number, since it is smaller than the sum of its proper divisors (24989499780).

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

13221301212 is a wasteful number, since it uses less digits than its factorization.

13221301212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21899 (or 21894 counting only the distinct ones).

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

Adding to 13221301212 its reverse (21210312231), we get a palindrome (34431613443).

The spelling of 13221301212 in words is "thirteen billion, two hundred twenty-one million, three hundred one thousand, two hundred twelve".