12102121112 has 8 divisors (see below), whose sum is σ = 22691477100. Its totient is φ = 6051060552.

The previous prime is 12102121099. The next prime is 12102121127. The reversal of 12102121112 is 21112120121.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×12102121112² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 756382562 + ... + 756382577.

Almost surely, 2^12102121112 is an apocalyptic number.

It is an amenable number.

12102121112 is a deficient number, since it is larger than the sum of its proper divisors (10589355988).

12102121112 is a wasteful number, since it uses less digits than its factorization.

12102121112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1512765145 (or 1512765141 counting only the distinct ones).

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

Adding to 12102121112 its reverse (21112120121), we get a palindrome (33214241233).

Subtracting 12102121112 from its reverse (21112120121), we obtain a palindrome (9009999009).

The spelling of 12102121112 in words is "twelve billion, one hundred two million, one hundred twenty-one thousand, one hundred twelve".