1002221121021 has 8 divisors (see below), whose sum is σ = 1336402150464. Its totient is φ = 668093752800.

The previous prime is 1002221121001. The next prime is 1002221121037. The reversal of 1002221121021 is 1201211222001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1002221121021 - 2¹⁴ = 1002221104637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002221121001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13371705 + ... + 13446446.

It is an arithmetic number, because the mean of its divisors is an integer number (167050268808).

Almost surely, 2^{1002221121021} is an apocalyptic number.

It is an amenable number.

1002221121021 is a deficient number, since it is larger than the sum of its proper divisors (334181029443).

1002221121021 is a wasteful number, since it uses less digits than its factorization.

1002221121021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26830611.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 1002221121021 its reverse (1201211222001), we get a palindrome (2203432343022).

The spelling of 1002221121021 in words is "one trillion, two billion, two hundred twenty-one million, one hundred twenty-one thousand, twenty-one".