1321000022 has 4 divisors (see below), whose sum is σ = 1981500036. Its totient is φ = 660500010.

The previous prime is 1321000019. The next prime is 1321000039. The reversal of 1321000022 is 2200001231.

It is a happy number.

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 = 1320999967 and 1321000012.

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, 330250004 + ... + 330250007.

It is an arithmetic number, because the mean of its divisors is an integer number (495375009).

Almost surely, 2^1321000022 is an apocalyptic number.

1321000022 is a deficient number, since it is larger than the sum of its proper divisors (660500014).

1321000022 is an equidigital number, since it uses as much as digits as its factorization.

1321000022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660500013.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 1321000022 is about 36345.5639934229. The cubic root of 1321000022 is about 1097.2382570869.

Adding to 1321000022 its reverse (2200001231), we get a palindrome (3521001253).

The spelling of 1321000022 in words is "one billion, three hundred twenty-one million, twenty-two", and thus it is an aban number.