1321002022 has 16 divisors (see below), whose sum is σ = 2026855872. Its totient is φ = 645427840.

The previous prime is 1321002019. The next prime is 1321002043. The reversal of 1321002022 is 2202001231.

It is a junction number, because it is equal to n+sod(n) for n = 1321001993 and 1321002011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50622 + ... + 72142.

It is an arithmetic number, because the mean of its divisors is an integer number (126678492).

Almost surely, 2^1321002022 is an apocalyptic number.

1321002022 is a deficient number, since it is larger than the sum of its proper divisors (705853850).

1321002022 is a wasteful number, since it uses less digits than its factorization.

1321002022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22223.

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

The square root of 1321002022 is about 36345.5915070865. The cubic root of 1321002022 is about 1097.2388108279.

Adding to 1321002022 its reverse (2202001231), we get a palindrome (3523003253).

The spelling of 1321002022 in words is "one billion, three hundred twenty-one million, two thousand, twenty-two".