13020102231221 has 4 divisors (see below), whose sum is σ = 13020113964000. Its totient is φ = 13020090498444.

The previous prime is 13020102231193. The next prime is 13020102231239. The reversal of 13020102231221 is 12213220102031.

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 13020102231221 - 2²² = 13020098036917 is a prime.

It is a super-2 number, since 2×13020102231221² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13020102231193 and 13020102231202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13020102231821) 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, 4004921 + ... + 6486878.

It is an arithmetic number, because the mean of its divisors is an integer number (3255028491000).

Almost surely, 2^{13020102231221} is an apocalyptic number.

It is an amenable number.

13020102231221 is a deficient number, since it is larger than the sum of its proper divisors (11732779).

13020102231221 is a wasteful number, since it uses less digits than its factorization.

13020102231221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11732778.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 13020102231221 its reverse (12213220102031), we get a palindrome (25233322333252).

The spelling of 13020102231221 in words is "thirteen trillion, twenty billion, one hundred two million, two hundred thirty-one thousand, two hundred twenty-one".