21412211221413 has 12 divisors (see below), whose sum is σ = 30928793024428. Its totient is φ = 14274787412160.

The previous prime is 21412211221391. The next prime is 21412211221451. The reversal of 21412211221413 is 31412211221412.

21412211221413 is a `hidden beast` number, since 2 + 1 + 4 + 1 + 2 + 21 + 1 + 221 + 413 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 3495471465924 + 17916739755489 = 1869618^2 + 4232817^2 .

It is not a de Polignac number, because 21412211221413 - 2²⁴ = 21412194444197 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21412211221493) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8074953 + ... + 10393713.

Almost surely, 2^{21412211221413} is an apocalyptic number.

It is an amenable number.

21412211221413 is a deficient number, since it is larger than the sum of its proper divisors (9516581803015).

21412211221413 is a wasteful number, since it uses less digits than its factorization.

21412211221413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3344804 (or 3344801 counting only the distinct ones).

The product of its digits is 1536, while the sum is 27.

Adding to 21412211221413 its reverse (31412211221412), we get a palindrome (52824422442825).

Subtracting 21412211221413 from its reverse (31412211221412), we obtain a palindrome (9999999999999).

The spelling of 21412211221413 in words is "twenty-one trillion, four hundred twelve billion, two hundred eleven million, two hundred twenty-one thousand, four hundred thirteen".