13353523202421 has 20 divisors (see below), whose sum is σ = 19980186120972. Its totient is φ = 8887920326208.

The previous prime is 13353523202387. The next prime is 13353523202441. The reversal of 13353523202421 is 12420232535331.

13353523202421 is a `hidden beast` number, since 1 + 3 + 3 + 5 + 3 + 5 + 23 + 202 + 421 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 127856304900 + 13225666897521 = 357570^2 + 3636711^2 .

It is not a de Polignac number, because 13353523202421 - 2¹⁴ = 13353523186037 is a prime.

It is a super-2 number, since 2×13353523202421² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13353523202441) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 133546710 + ... + 133646663.

Almost surely, 2^{13353523202421} is an apocalyptic number.

It is an amenable number.

13353523202421 is a deficient number, since it is larger than the sum of its proper divisors (6626662918551).

13353523202421 is an equidigital number, since it uses as much as digits as its factorization.

13353523202421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267194002 (or 267193993 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 36.

Adding to 13353523202421 its reverse (12420232535331), we get a palindrome (25773755737752).

The spelling of 13353523202421 in words is "thirteen trillion, three hundred fifty-three billion, five hundred twenty-three million, two hundred two thousand, four hundred twenty-one".