12102121011100 has 36 divisors (see below), whose sum is σ = 26265656091808. Its totient is φ = 4840101216000.

The previous prime is 12102121011059. The next prime is 12102121011103. The reversal of 12102121011100 is 111012120121.

It is a happy number.

It is a super-2 number, since 2×12102121011100² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12102121011103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8688516 + ... + 9984715.

Almost surely, 2^{12102121011100} is an apocalyptic number.

12102121011100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12102121011100 is an abundant number, since it is smaller than the sum of its proper divisors (14163535080708).

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

12102121011100 is a wasteful number, since it uses less digits than its factorization.

12102121011100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18679726 (or 18679719 counting only the distinct ones).

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

Adding to 12102121011100 its reverse (111012120121), we get a palindrome (12213133131221).

The spelling of 12102121011100 in words is "twelve trillion, one hundred two billion, one hundred twenty-one million, eleven thousand, one hundred".