102121112102 has 4 divisors (see below), whose sum is σ = 153181668156. Its totient is φ = 51060556050.

The previous prime is 102121112099. The next prime is 102121112117. The reversal of 102121112102 is 201211121201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 201211121201 = 109 ⋅1845973589.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25530278024 + ... + 25530278027.

It is an arithmetic number, because the mean of its divisors is an integer number (38295417039).

Almost surely, 2^102121112102 is an apocalyptic number.

102121112102 is a deficient number, since it is larger than the sum of its proper divisors (51060556054).

102121112102 is an equidigital number, since it uses as much as digits as its factorization.

102121112102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51060556053.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 102121112102 its reverse (201211121201), we get a palindrome (303332233303).

Subtracting 102121112102 from its reverse (201211121201), we obtain a palindrome (99090009099).

The spelling of 102121112102 in words is "one hundred two billion, one hundred twenty-one million, one hundred twelve thousand, one hundred two".