13013101221 has 4 divisors (see below), whose sum is σ = 17350801632. Its totient is φ = 8675400812.

The previous prime is 13013101217. The next prime is 13013101249. The reversal of 13013101221 is 12210131031.

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 13013101221 - 2² = 13013101217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13013101221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13013101261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2168850201 + ... + 2168850206.

It is an arithmetic number, because the mean of its divisors is an integer number (4337700408).

Almost surely, 2^13013101221 is an apocalyptic number.

It is an amenable number.

13013101221 is a deficient number, since it is larger than the sum of its proper divisors (4337700411).

13013101221 is an equidigital number, since it uses as much as digits as its factorization.

13013101221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4337700410.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 13013101221 its reverse (12210131031), we get a palindrome (25223232252).

The spelling of 13013101221 in words is "thirteen billion, thirteen million, one hundred one thousand, two hundred twenty-one".