1022021000221 has 32 divisors (see below), whose sum is σ = 1165604209280. Its totient is φ = 888330240000.

The previous prime is 1022021000213. The next prime is 1022021000227. The reversal of 1022021000221 is 1220001202201.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1022021000221 - 2³ = 1022021000213 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1022021000227) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 57243946 + ... + 57261796.

It is an arithmetic number, because the mean of its divisors is an integer number (36425131540).

Almost surely, 2^{1022021000221} is an apocalyptic number.

It is an amenable number.

1022021000221 is a deficient number, since it is larger than the sum of its proper divisors (143583209059).

1022021000221 is a wasteful number, since it uses less digits than its factorization.

1022021000221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19277.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 1022021000221 its reverse (1220001202201), we get a palindrome (2242022202422).

The spelling of 1022021000221 in words is "one trillion, twenty-two billion, twenty-one million, two hundred twenty-one", and thus it is an aban number.