102111110212 has 6 divisors (see below), whose sum is σ = 178694442878. Its totient is φ = 51055555104.

The previous prime is 102111110177. The next prime is 102111110251. The reversal of 102111110212 is 212011111201.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 101975480896 + 135629316 = 319336^2 + 11646^2 .

It is a junction number, because it is equal to n+sod(n) for n = 102111110192 and 102111110201.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12763888773 + ... + 12763888780.

Almost surely, 2^102111110212 is an apocalyptic number.

It is an amenable number.

102111110212 is a deficient number, since it is larger than the sum of its proper divisors (76583332666).

102111110212 is a wasteful number, since it uses less digits than its factorization.

102111110212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25527777557 (or 25527777555 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 102111110212 its reverse (212011111201), we get a palindrome (314122221413).

The spelling of 102111110212 in words is "one hundred two billion, one hundred eleven million, one hundred ten thousand, two hundred twelve".