13121222213412 has 18 divisors (see below), whose sum is σ = 33167533928438. Its totient is φ = 4373740737792.

The previous prime is 13121222213387. The next prime is 13121222213471. The reversal of 13121222213412 is 21431222212131.

13121222213412 is a `hidden beast` number, since 1 + 3 + 1 + 2 + 1 + 22 + 221 + 3 + 412 = 666.

It can be written as a sum of positive squares in only one way, i.e., 12645320912676 + 475901300736 = 3556026^2 + 689856^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 182239197373 + ... + 182239197444.

Almost surely, 2^{13121222213412} is an apocalyptic number.

13121222213412 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

13121222213412 is an abundant number, since it is smaller than the sum of its proper divisors (20046311715026).

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

13121222213412 is a wasteful number, since it uses less digits than its factorization.

13121222213412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364478394827 (or 364478394822 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

Adding to 13121222213412 its reverse (21431222212131), we get a palindrome (34552444425543).

The spelling of 13121222213412 in words is "thirteen trillion, one hundred twenty-one billion, two hundred twenty-two million, two hundred thirteen thousand, four hundred twelve".