13120412021 has 2 divisors, whose sum is σ = 13120412022. Its totient is φ = 13120412020.

The previous prime is 13120412003. The next prime is 13120412051. The reversal of 13120412021 is 12021402131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9766380625 + 3354031396 = 98825^2 + 57914^2 .

It is a cyclic number.

It is not a de Polignac number, because 13120412021 - 2¹⁴ = 13120395637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13120412051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6560206010 + 6560206011.

It is an arithmetic number, because the mean of its divisors is an integer number (6560206011).

Almost surely, 2^13120412021 is an apocalyptic number.

It is an amenable number.

13120412021 is a deficient number, since it is larger than the sum of its proper divisors (1).

13120412021 is an equidigital number, since it uses as much as digits as its factorization.

13120412021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 13120412021 its reverse (12021402131), we get a palindrome (25141814152).

The spelling of 13120412021 in words is "thirteen billion, one hundred twenty million, four hundred twelve thousand, twenty-one".