1002221001021 has 16 divisors (see below), whose sum is σ = 1344093791040. Its totient is φ = 664248203520.

The previous prime is 1002221000987. The next prime is 1002221001049. The reversal of 1002221001021 is 1201001222001.

It is not a de Polignac number, because 1002221001021 - 2¹⁵ = 1002220968253 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1002221000988 and 1002221001006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002221001091) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11774706 + ... + 11859516.

It is an arithmetic number, because the mean of its divisors is an integer number (84005861940).

Almost surely, 2^{1002221001021} is an apocalyptic number.

It is an amenable number.

1002221001021 is a deficient number, since it is larger than the sum of its proper divisors (341872790019).

1002221001021 is a wasteful number, since it uses less digits than its factorization.

1002221001021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107756.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 1002221001021 its reverse (1201001222001), we get a palindrome (2203222223022).

The spelling of 1002221001021 in words is "one trillion, two billion, two hundred twenty-one million, one thousand, twenty-one".