100002221021 has 64 divisors (see below), whose sum is σ = 110584320000. Its totient is φ = 90229531392.

The previous prime is 100002221009. The next prime is 100002221063. The reversal of 100002221021 is 120122200001.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 100002221021 - 2¹⁰ = 100002219997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100002220993 and 100002221011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100002223021) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 719440370 + ... + 719440508.

It is an arithmetic number, because the mean of its divisors is an integer number (1727880000).

Almost surely, 2^100002221021 is an apocalyptic number.

It is an amenable number.

100002221021 is a deficient number, since it is larger than the sum of its proper divisors (10582098979).

100002221021 is a wasteful number, since it uses less digits than its factorization.

100002221021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 466.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 100002221021 its reverse (120122200001), we get a palindrome (220124421022).

The spelling of 100002221021 in words is "one hundred billion, two million, two hundred twenty-one thousand, twenty-one".