102111222222 has 12 divisors (see below), whose sum is σ = 221240981520. Its totient is φ = 34037074068.

The previous prime is 102111222197. The next prime is 102111222223. The reversal of 102111222222 is 222222111201.

It is a happy number.

102111222222 is a `hidden beast` number, since 10 + 211 + 1 + 222 + 222 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 5672845679 = 102111222222 / (1 + 0 + 2 + 1 + 1 + 1 + 2 + 2 + 2 + 2 + 2 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 102111222195 and 102111222204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102111222223) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2836422822 + ... + 2836422857.

It is an arithmetic number, because the mean of its divisors is an integer number (18436748460).

Almost surely, 2^102111222222 is an apocalyptic number.

102111222222 is an abundant number, since it is smaller than the sum of its proper divisors (119129759298).

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

102111222222 is a wasteful number, since it uses less digits than its factorization.

102111222222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5672845687 (or 5672845684 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 102111222222 its reverse (222222111201), we get a palindrome (324333333423).

The spelling of 102111222222 in words is "one hundred two billion, one hundred eleven million, two hundred twenty-two thousand, two hundred twenty-two".