1002221992 has 16 divisors (see below), whose sum is σ = 1879824960. Its totient is φ = 500935344.

The previous prime is 1002221989. The next prime is 1002222017. The reversal of 1002221992 is 2991222001.

It is a self number, because there is not a number n which added to its sum of digits gives 1002221992.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4113 + ... + 44959.

It is an arithmetic number, because the mean of its divisors is an integer number (117489060).

Almost surely, 2^1002221992 is an apocalyptic number.

It is an amenable number.

1002221992 is a deficient number, since it is larger than the sum of its proper divisors (877602968).

1002221992 is a wasteful number, since it uses less digits than its factorization.

1002221992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43920 (or 43916 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 1002221992 is about 31657.8898854614. The cubic root of 1002221992 is about 1000.7401160930.

Adding to 1002221992 its reverse (2991222001), we get a palindrome (3993443993).

The spelling of 1002221992 in words is "one billion, two million, two hundred twenty-one thousand, nine hundred ninety-two".