102112213122 has 48 divisors (see below), whose sum is σ = 223043228928. Its totient is φ = 33761145600.

The previous prime is 102112213121. The next prime is 102112213139. The reversal of 102112213122 is 221312211201.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 102112213095 and 102112213104.

It is not an unprimeable number, because it can be changed into a prime (102112213121) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1801303 + ... + 1857125.

It is an arithmetic number, because the mean of its divisors is an integer number (4646733936).

Almost surely, 2^102112213122 is an apocalyptic number.

102112213122 is an abundant number, since it is smaller than the sum of its proper divisors (120931015806).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

102112213122 is a wasteful number, since it uses less digits than its factorization.

102112213122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56655 (or 56652 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 102112213122 its reverse (221312211201), we get a palindrome (323424424323).

The spelling of 102112213122 in words is "one hundred two billion, one hundred twelve million, two hundred thirteen thousand, one hundred twenty-two".