100221012021 has 8 divisors (see below), whose sum is σ = 143907094240. Its totient is φ = 61674468912.

The previous prime is 100221011993. The next prime is 100221012079. The reversal of 100221012021 is 120210122001.

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

It is not a de Polignac number, because 100221012021 - 2¹⁸ = 100220749877 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 100221011988 and 100221012006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100221012421) 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, 1284884731 + ... + 1284884808.

It is an arithmetic number, because the mean of its divisors is an integer number (17988386780).

Almost surely, 2^100221012021 is an apocalyptic number.

It is an amenable number.

100221012021 is a deficient number, since it is larger than the sum of its proper divisors (43686082219).

100221012021 is a wasteful number, since it uses less digits than its factorization.

100221012021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2569769555.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 100221012021 its reverse (120210122001), we get a palindrome (220431134022).

The spelling of 100221012021 in words is "one hundred billion, two hundred twenty-one million, twelve thousand, twenty-one".