102002100221 has 4 divisors (see below), whose sum is σ = 116573828832. Its totient is φ = 87430371612.

The previous prime is 102002100217. The next prime is 102002100247. The reversal of 102002100221 is 122001200201.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 102002100221 - 2² = 102002100217 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 (102002100251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7285864295 + ... + 7285864308.

It is an arithmetic number, because the mean of its divisors is an integer number (29143457208).

Almost surely, 2^102002100221 is an apocalyptic number.

It is an amenable number.

102002100221 is a deficient number, since it is larger than the sum of its proper divisors (14571728611).

102002100221 is an equidigital number, since it uses as much as digits as its factorization.

102002100221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14571728610.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 102002100221 its reverse (122001200201), we get a palindrome (224003300422).

The spelling of 102002100221 in words is "one hundred two billion, two million, one hundred thousand, two hundred twenty-one".