1322140021 has 8 divisors (see below), whose sum is σ = 1330458584. Its totient is φ = 1313832960.

The previous prime is 1322140019. The next prime is 1322140063. The reversal of 1322140021 is 1200412231.

It can be written as a sum of positive squares in 4 ways, for example, as 493506225 + 828633796 = 22215^2 + 28786^2 .

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 1322140021 - 2¹ = 1322140019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1322139977 and 1322140004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1322140081) 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, 380725 + ... + 384181.

It is an arithmetic number, because the mean of its divisors is an integer number (166307323).

Almost surely, 2^1322140021 is an apocalyptic number.

It is an amenable number.

1322140021 is a deficient number, since it is larger than the sum of its proper divisors (8318563).

1322140021 is a wasteful number, since it uses less digits than its factorization.

1322140021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5751.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 1322140021 is about 36361.2433918314. The cubic root of 1322140021 is about 1097.5537985573.

Adding to 1322140021 its reverse (1200412231), we get a palindrome (2522552252).

The spelling of 1322140021 in words is "one billion, three hundred twenty-two million, one hundred forty thousand, twenty-one".