102120112100221 has 4 divisors (see below), whose sum is σ = 102328096035744. Its totient is φ = 101912128164700.

The previous prime is 102120112100189. The next prime is 102120112100353. The reversal of 102120112100221 is 122001211021201.

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 102120112100221 - 2⁵ = 102120112100189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102120112100195 and 102120112100204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102120112100621) 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, 103991967025 + ... + 103991968006.

It is an arithmetic number, because the mean of its divisors is an integer number (25582024008936).

Almost surely, 2^{102120112100221} is an apocalyptic number.

It is an amenable number.

102120112100221 is a deficient number, since it is larger than the sum of its proper divisors (207983935523).

102120112100221 is an equidigital number, since it uses as much as digits as its factorization.

102120112100221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207983935522.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 102120112100221 its reverse (122001211021201), we get a palindrome (224121323121422).

The spelling of 102120112100221 in words is "one hundred two trillion, one hundred twenty billion, one hundred twelve million, one hundred thousand, two hundred twenty-one".