102113221 has 4 divisors (see below), whose sum is σ = 116700832. Its totient is φ = 87525612.

The previous prime is 102113213. The next prime is 102113251. The reversal of 102113221 is 122311201.

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, and also an emirpimes, since its reverse is a distinct semiprime: 122311201 = 3547 ⋅34483.

It is a cyclic number.

It is not a de Polignac number, because 102113221 - 2³ = 102113213 is a prime.

It is a super-3 number, since 3×102113221³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102113251) 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, 7293795 + ... + 7293808.

It is an arithmetic number, because the mean of its divisors is an integer number (29175208).

Almost surely, 2^102113221 is an apocalyptic number.

It is an amenable number.

102113221 is a deficient number, since it is larger than the sum of its proper divisors (14587611).

102113221 is an equidigital number, since it uses as much as digits as its factorization.

102113221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14587610.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 102113221 is about 10105.1086584955. The cubic root of 102113221 is about 467.4056865995.

Adding to 102113221 its reverse (122311201), we get a palindrome (224424422).

The spelling of 102113221 in words is "one hundred two million, one hundred thirteen thousand, two hundred twenty-one".