13202020213121 has 2 divisors, whose sum is σ = 13202020213122. Its totient is φ = 13202020213120.

The previous prime is 13202020213111. The next prime is 13202020213133. The reversal of 13202020213121 is 12131202020231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9220399053121 + 3981621160000 = 3036511^2 + 1995400^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13202020213121 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 13202020213093 and 13202020213102.

It is not a weakly prime, because it can be changed into another prime (13202020213111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6601010106560 + 6601010106561.

It is an arithmetic number, because the mean of its divisors is an integer number (6601010106561).

Almost surely, 2^{13202020213121} is an apocalyptic number.

It is an amenable number.

13202020213121 is a deficient number, since it is larger than the sum of its proper divisors (1).

13202020213121 is an equidigital number, since it uses as much as digits as its factorization.

13202020213121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 13202020213121 its reverse (12131202020231), we get a palindrome (25333222233352).

The spelling of 13202020213121 in words is "thirteen trillion, two hundred two billion, twenty million, two hundred thirteen thousand, one hundred twenty-one".