1002021221104 has 20 divisors (see below), whose sum is σ = 2025825512976. Its totient is φ = 479227540352.

The previous prime is 1002021221101. The next prime is 1002021221111. The reversal of 1002021221104 is 4011221202001.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002021221101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1361441509 + ... + 1361442244.

Almost surely, 2^{1002021221104} is an apocalyptic number.

It is an amenable number.

1002021221104 is an abundant number, since it is smaller than the sum of its proper divisors (1023804291872).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1002021221104 is a wasteful number, since it uses less digits than its factorization.

1002021221104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2722883784 (or 2722883778 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1002021221104 its reverse (4011221202001), we get a palindrome (5013242423105).

The spelling of 1002021221104 in words is "one trillion, two billion, twenty-one million, two hundred twenty-one thousand, one hundred four".