102110310221 has 4 divisors (see below), whose sum is σ = 102147457500. Its totient is φ = 102073162944.

The previous prime is 102110310217. The next prime is 102110310299. The reversal of 102110310221 is 122013011201.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13136368996 + 88973941225 = 114614^2 + 298285^2 .

It is a cyclic number.

It is not a de Polignac number, because 102110310221 - 2² = 102110310217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102110310196 and 102110310205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102110360221) 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, 18569516 + ... + 18575013.

It is an arithmetic number, because the mean of its divisors is an integer number (25536864375).

Almost surely, 2^102110310221 is an apocalyptic number.

It is an amenable number.

102110310221 is a deficient number, since it is larger than the sum of its proper divisors (37147279).

102110310221 is an equidigital number, since it uses as much as digits as its factorization.

102110310221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37147278.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 102110310221 its reverse (122013011201), we get a palindrome (224123321422).

The spelling of 102110310221 in words is "one hundred two billion, one hundred ten million, three hundred ten thousand, two hundred twenty-one".