102312221 has 8 divisors (see below), whose sum is σ = 111686688. Its totient is φ = 92950000.

The previous prime is 102312209. The next prime is 102312227. The reversal of 102312221 is 122213201.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 102312221 - 2⁶ = 102312157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102312196 and 102312205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102312227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29846 + ... + 33096.

It is an arithmetic number, because the mean of its divisors is an integer number (13960836).

Almost surely, 2^102312221 is an apocalyptic number.

102312221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

102312221 is a deficient number, since it is larger than the sum of its proper divisors (9374467).

102312221 is a wasteful number, since it uses less digits than its factorization.

102312221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6123.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 102312221 is about 10114.9503706148. The cubic root of 102312221 is about 467.7091189850.

Adding to 102312221 its reverse (122213201), we get a palindrome (224525422).

The spelling of 102312221 in words is "one hundred two million, three hundred twelve thousand, two hundred twenty-one".