102121312112 has 20 divisors (see below), whose sum is σ = 197882088456. Its totient is φ = 51054966720.

The previous prime is 102121312103. The next prime is 102121312129. The reversal of 102121312112 is 211213121201.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 205583 + ... + 496494.

Almost surely, 2^102121312112 is an apocalyptic number.

It is an amenable number.

102121312112 is a deficient number, since it is larger than the sum of its proper divisors (95760776344).

102121312112 is an equidigital number, since it uses as much as digits as its factorization.

102121312112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 711176 (or 711170 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 102121312112 its reverse (211213121201), we get a palindrome (313334433313).

The spelling of 102121312112 in words is "one hundred two billion, one hundred twenty-one million, three hundred twelve thousand, one hundred twelve".