13222132021 has 6 divisors (see below), whose sum is σ = 15380847510. Its totient is φ = 11333255976.

The previous prime is 13222131947. The next prime is 13222132031. The reversal of 13222132021 is 12023122231.

It can be written as a sum of positive squares in only one way, i.e., 9515027025 + 3707104996 = 97545^2 + 60886^2 .

It is not a de Polignac number, because 13222132021 - 2¹⁹ = 13221607733 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13222132021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13222132031) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 134919666 + ... + 134919763.

It is an arithmetic number, because the mean of its divisors is an integer number (2563474585).

Almost surely, 2^13222132021 is an apocalyptic number.

It is an amenable number.

13222132021 is a deficient number, since it is larger than the sum of its proper divisors (2158715489).

13222132021 is an equidigital number, since it uses as much as digits as its factorization.

13222132021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269839443 (or 269839436 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 13222132021 its reverse (12023122231), we get a palindrome (25245254252).

The spelling of 13222132021 in words is "thirteen billion, two hundred twenty-two million, one hundred thirty-two thousand, twenty-one".