21210120033413 has 2 divisors, whose sum is σ = 21210120033414. Its totient is φ = 21210120033412.

The previous prime is 21210120033391. The next prime is 21210120033419. The reversal of 21210120033413 is 31433002101212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16627857486529 + 4582262546884 = 4077727^2 + 2140622^2 .

It is a cyclic number.

It is not a de Polignac number, because 21210120033413 - 2²⁴ = 21210103256197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21210120033419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10605060016706 + 10605060016707.

It is an arithmetic number, because the mean of its divisors is an integer number (10605060016707).

Almost surely, 2^{21210120033413} is an apocalyptic number.

It is an amenable number.

21210120033413 is a deficient number, since it is larger than the sum of its proper divisors (1).

21210120033413 is an equidigital number, since it uses as much as digits as its factorization.

21210120033413 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 21210120033413 its reverse (31433002101212), we get a palindrome (52643122134625).

The spelling of 21210120033413 in words is "twenty-one trillion, two hundred ten billion, one hundred twenty million, thirty-three thousand, four hundred thirteen".