1322113021 has 4 divisors (see below), whose sum is σ = 1322199612. Its totient is φ = 1322026432.

The previous prime is 1322112997. The next prime is 1322113057. The reversal of 1322113021 is 1203112231.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 675428121 + 646684900 = 25989^2 + 25430^2 .

It is a cyclic number.

It is not a de Polignac number, because 1322113021 - 2¹⁹ = 1321588733 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1322112986 and 1322113004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1322113421) 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, 13606 + ... + 53191.

It is an arithmetic number, because the mean of its divisors is an integer number (330549903).

Almost surely, 2^1322113021 is an apocalyptic number.

It is an amenable number.

1322113021 is a deficient number, since it is larger than the sum of its proper divisors (86591).

1322113021 is an equidigital number, since it uses as much as digits as its factorization.

1322113021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86590.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1322113021 is about 36360.8721155035. The cubic root of 1322113021 is about 1097.5463272976.

Adding to 1322113021 its reverse (1203112231), we get a palindrome (2525225252).

The spelling of 1322113021 in words is "one billion, three hundred twenty-two million, one hundred thirteen thousand, twenty-one".