102000100221 has 12 divisors (see below), whose sum is σ = 147591512640. Its totient is φ = 67880973960.

The previous prime is 102000100187. The next prime is 102000100247. The reversal of 102000100221 is 122001000201.

It is not a de Polignac number, because 102000100221 - 2²² = 101995905917 is a prime.

It is a super-3 number, since 3×102000100221³ (a number of 34 digits) contains 333 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102000100271) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9918981 + ... + 9929258.

It is an arithmetic number, because the mean of its divisors is an integer number (12299292720).

Almost surely, 2^102000100221 is an apocalyptic number.

It is an amenable number.

102000100221 is a deficient number, since it is larger than the sum of its proper divisors (45591412419).

102000100221 is a wasteful number, since it uses less digits than its factorization.

102000100221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19848816 (or 19848813 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 102000100221 its reverse (122001000201), we get a palindrome (224001100422).

The spelling of 102000100221 in words is "one hundred two billion, one hundred thousand, two hundred twenty-one".