13235206021 has 16 divisors (see below), whose sum is σ = 13513760640. Its totient is φ = 12960460800.

The previous prime is 13235206007. The next prime is 13235206069. The reversal of 13235206021 is 12060253231.

It is a cyclic number.

It is not a de Polignac number, because 13235206021 - 2⁵ = 13235205989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13235206091) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3291150 + ... + 3295168.

It is an arithmetic number, because the mean of its divisors is an integer number (844610040).

Almost surely, 2^13235206021 is an apocalyptic number.

It is an amenable number.

13235206021 is a deficient number, since it is larger than the sum of its proper divisors (278554619).

13235206021 is a wasteful number, since it uses less digits than its factorization.

13235206021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4476.

The product of its (nonzero) digits is 2160, while the sum is 25.

Adding to 13235206021 its reverse (12060253231), we get a palindrome (25295459252).

The spelling of 13235206021 in words is "thirteen billion, two hundred thirty-five million, two hundred six thousand, twenty-one".