13313211212021 has 4 divisors (see below), whose sum is σ = 15215098528032. Its totient is φ = 11411323896012.

The previous prime is 13313211211901. The next prime is 13313211212027. The reversal of 13313211212021 is 12021211231331.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13313211212021 - 2²² = 13313207017717 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 (13313211212027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 950943657995 + ... + 950943658008.

It is an arithmetic number, because the mean of its divisors is an integer number (3803774632008).

Almost surely, 2^{13313211212021} is an apocalyptic number.

It is an amenable number.

13313211212021 is a deficient number, since it is larger than the sum of its proper divisors (1901887316011).

13313211212021 is an equidigital number, since it uses as much as digits as its factorization.

13313211212021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1901887316010.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 13313211212021 its reverse (12021211231331), we get a palindrome (25334422443352).

The spelling of 13313211212021 in words is "thirteen trillion, three hundred thirteen billion, two hundred eleven million, two hundred twelve thousand, twenty-one".