100010021221 has 12 divisors (see below), whose sum is σ = 112484850016. Its totient is φ = 88803819720.

The previous prime is 100010021219. The next prime is 100010021231. The reversal of 100010021221 is 122120010001.

It is not a de Polignac number, because 100010021221 - 2¹ = 100010021219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 100010021198 and 100010021207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100010021231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9605601 + ... + 9616006.

Almost surely, 2^100010021221 is an apocalyptic number.

100010021221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

100010021221 is a deficient number, since it is larger than the sum of its proper divisors (12474828795).

100010021221 is a wasteful number, since it uses less digits than its factorization.

100010021221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19221672 (or 19221661 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 100010021221 its reverse (122120010001), we get a palindrome (222130031222).

The spelling of 100010021221 in words is "one hundred billion, ten million, twenty-one thousand, two hundred twenty-one".