102100220221 has 16 divisors (see below), whose sum is σ = 109172044800. Its totient is φ = 95273539200.

The previous prime is 102100220179. The next prime is 102100220227. The reversal of 102100220221 is 122022001201.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 102100220221 - 2²⁷ = 101966002493 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 (102100220227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 609520 + ... + 758758.

It is an arithmetic number, because the mean of its divisors is an integer number (6823252800).

Almost surely, 2^102100220221 is an apocalyptic number.

It is an amenable number.

102100220221 is a deficient number, since it is larger than the sum of its proper divisors (7071824579).

102100220221 is a wasteful number, since it uses less digits than its factorization.

102100220221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150060.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 102100220221 its reverse (122022001201), we get a palindrome (224122221422).

The spelling of 102100220221 in words is "one hundred two billion, one hundred million, two hundred twenty thousand, two hundred twenty-one".