1321200022 has 4 divisors (see below), whose sum is σ = 1981800036. Its totient is φ = 660600010.

The previous prime is 1321199977. The next prime is 1321200047. The reversal of 1321200022 is 2200021231.

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

It is a junction number, because it is equal to n+sod(n) for n = 1321199975 and 1321200011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330300004 + ... + 330300007.

It is an arithmetic number, because the mean of its divisors is an integer number (495450009).

Almost surely, 2^1321200022 is an apocalyptic number.

1321200022 is a deficient number, since it is larger than the sum of its proper divisors (660600014).

1321200022 is an equidigital number, since it uses as much as digits as its factorization.

1321200022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660600013.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 1321200022 is about 36348.3152566938. The cubic root of 1321200022 is about 1097.2936284152.

Adding to 1321200022 its reverse (2200021231), we get a palindrome (3521221253).

The spelling of 1321200022 in words is "one billion, three hundred twenty-one million, two hundred thousand, twenty-two".