102112112221 has 8 divisors (see below), whose sum is σ = 117770195840. Its totient is φ = 86721688368.

The previous prime is 102112112213. The next prime is 102112112273. The reversal of 102112112221 is 122211211201.

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

It is not a de Polignac number, because 102112112221 - 2³ = 102112112213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102112112195 and 102112112204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102112112021) 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, 66914121 + ... + 66915646.

It is an arithmetic number, because the mean of its divisors is an integer number (14721274480).

Almost surely, 2^102112112221 is an apocalyptic number.

It is an amenable number.

102112112221 is a deficient number, since it is larger than the sum of its proper divisors (15658083619).

102112112221 is a wasteful number, since it uses less digits than its factorization.

102112112221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133829883.

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

Adding to 102112112221 its reverse (122211211201), we get a palindrome (224323323422).

The spelling of 102112112221 in words is "one hundred two billion, one hundred twelve million, one hundred twelve thousand, two hundred twenty-one".