1321222002 has 16 divisors (see below), whose sum is σ = 2643039072. Its totient is φ = 440308160.

The previous prime is 1321221973. The next prime is 1321222013. The reversal of 1321222002 is 2002221231.

It is a happy 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, 7258 + ... + 51914.

It is an arithmetic number, because the mean of its divisors is an integer number (165189942).

Almost surely, 2^1321222002 is an apocalyptic number.

1321222002 is an abundant number, since it is smaller than the sum of its proper divisors (1321817070).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1321222002 is a wasteful number, since it uses less digits than its factorization.

1321222002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49593.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 1321222002 is about 36348.6176078266. The cubic root of 1321222002 is about 1097.2997133833.

Adding to 1321222002 its reverse (2002221231), we get a palindrome (3323443233).

The spelling of 1321222002 in words is "one billion, three hundred twenty-one million, two hundred twenty-two thousand, two".