13100233221221 has 8 divisors (see below), whose sum is σ = 13174915362840. Its totient is φ = 13025633741568.

The previous prime is 13100233221181. The next prime is 13100233221239. The reversal of 13100233221221 is 12212233200131.

It can be written as a sum of positive squares in 4 ways, for example, as 7497662570596 + 5602570650625 = 2738186^2 + 2366975^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13100233221221 - 2⁶ = 13100233221157 is a prime.

It is a super-2 number, since 2×13100233221221² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13100233221821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20347616 + ... + 20981561.

It is an arithmetic number, because the mean of its divisors is an integer number (1646864420355).

Almost surely, 2^{13100233221221} is an apocalyptic number.

It is an amenable number.

13100233221221 is a deficient number, since it is larger than the sum of its proper divisors (74682141619).

13100233221221 is a wasteful number, since it uses less digits than its factorization.

13100233221221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41330983.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 13100233221221 its reverse (12212233200131), we get a palindrome (25312466421352).

The spelling of 13100233221221 in words is "thirteen trillion, one hundred billion, two hundred thirty-three million, two hundred twenty-one thousand, two hundred twenty-one".