12012122100 has 72 divisors (see below), whose sum is σ = 37914635808. Its totient is φ = 2912028800.

The previous prime is 12012122099. The next prime is 12012122147. The reversal of 12012122100 is 122121021.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1816719 + ... + 1823318.

It is an arithmetic number, because the mean of its divisors is an integer number (526592164).

Almost surely, 2^12012122100 is an apocalyptic number.

12012122100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12012122100 is an abundant number, since it is smaller than the sum of its proper divisors (25902513708).

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

12012122100 is a wasteful number, since it uses less digits than its factorization.

12012122100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3640065 (or 3640058 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 12012122100 its reverse (122121021), we get a palindrome (12134243121).

The spelling of 12012122100 in words is "twelve billion, twelve million, one hundred twenty-two thousand, one hundred".