1321320122 has 4 divisors (see below), whose sum is σ = 1981980186. Its totient is φ = 660660060.

The previous prime is 1321320113. The next prime is 1321320131. The reversal of 1321320122 is 2210231231.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1321320113) and next prime (1321320131).

It can be written as a sum of positive squares in only one way, i.e., 722588161 + 598731961 = 26881^2 + 24469^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1321320122.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330330029 + ... + 330330032.

Almost surely, 2^1321320122 is an apocalyptic number.

1321320122 is a deficient number, since it is larger than the sum of its proper divisors (660660064).

1321320122 is an equidigital number, since it uses as much as digits as its factorization.

1321320122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660660063.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1321320122 is about 36349.9672902191. The cubic root of 1321320122 is about 1097.3268762125.

Adding to 1321320122 its reverse (2210231231), we get a palindrome (3531551353).

The spelling of 1321320122 in words is "one billion, three hundred twenty-one million, three hundred twenty thousand, one hundred twenty-two".