12121112212100 has 36 divisors (see below), whose sum is σ = 26315971920000. Its totient is φ = 4846019369760.

The previous prime is 12121112212057. The next prime is 12121112212103. The reversal of 12121112212100 is 121221112121.

It is a super-2 number, since 2×12121112212100² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12121112212103) 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, 30118040 + ... + 30517839.

It is an arithmetic number, because the mean of its divisors is an integer number (730999220000).

Almost surely, 2^{12121112212100} is an apocalyptic number.

12121112212100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12121112212100 is an abundant number, since it is smaller than the sum of its proper divisors (14194859707900).

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

12121112212100 is a wasteful number, since it uses less digits than its factorization.

12121112212100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60637892 (or 60637885 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 12121112212100 its reverse (121221112121), we get a palindrome (12242333324221).

The spelling of 12121112212100 in words is "twelve trillion, one hundred twenty-one billion, one hundred twelve million, two hundred twelve thousand, one hundred".