1021000221992 has 16 divisors (see below), whose sum is σ = 1976129462400. Its totient is φ = 494032365360.

The previous prime is 1021000221973. The next prime is 1021000222043. The reversal of 1021000221992 is 2991220001201.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2058467942 + ... + 2058468437.

It is an arithmetic number, because the mean of its divisors is an integer number (123508091400).

Almost surely, 2^{1021000221992} is an apocalyptic number.

It is an amenable number.

1021000221992 is a deficient number, since it is larger than the sum of its proper divisors (955129240408).

1021000221992 is a wasteful number, since it uses less digits than its factorization.

1021000221992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4116936416 (or 4116936412 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 29.

The spelling of 1021000221992 in words is "one trillion, twenty-one billion, two hundred twenty-one thousand, nine hundred ninety-two".