100002101001021 has 24 divisors (see below), whose sum is σ = 150826772581056. Its totient is φ = 63727584560640.

The previous prime is 100002101001017. The next prime is 100002101001031. The reversal of 100002101001021 is 120100101200001.

It is a happy number.

It is not a de Polignac number, because 100002101001021 - 2² = 100002101001017 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 100002101000994 and 100002101001012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100002101001031) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 158286820 + ... + 158917341.

It is an arithmetic number, because the mean of its divisors is an integer number (6284448857544).

Almost surely, 2^{100002101001021} is an apocalyptic number.

It is an amenable number.

100002101001021 is a deficient number, since it is larger than the sum of its proper divisors (50824671580035).

100002101001021 is a wasteful number, since it uses less digits than its factorization.

100002101001021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317205713 (or 317205710 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 100002101001021 its reverse (120100101200001), we get a palindrome (220102202201022).

The spelling of 100002101001021 in words is "one hundred trillion, two billion, one hundred one million, one thousand, twenty-one".