100210001021 has 8 divisors (see below), whose sum is σ = 107924154744. Its totient is φ = 92496660480.

The previous prime is 100210000967. The next prime is 100210001027. The reversal of 100210001021 is 120100012001.

It can be written as a sum of positive squares in 4 ways, for example, as 5339224900 + 94870776121 = 73070^2 + 308011^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 100210001021 - 2²² = 100205806717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100210001027) 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, 65861 + ... + 452501.

It is an arithmetic number, because the mean of its divisors is an integer number (13490519343).

Almost surely, 2^100210001021 is an apocalyptic number.

It is an amenable number.

100210001021 is a deficient number, since it is larger than the sum of its proper divisors (7714153723).

100210001021 is a wasteful number, since it uses less digits than its factorization.

100210001021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406591.

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 100210001021 its reverse (120100012001), we get a palindrome (220310013022).

The spelling of 100210001021 in words is "one hundred billion, two hundred ten million, one thousand, twenty-one".