12122121100 has 36 divisors (see below), whose sum is σ = 26675511408. Its totient is φ = 4780552000.

The previous prime is 12122121071. The next prime is 12122121103. The reversal of 12122121100 is 112122121.

It is not an unprimeable number, because it can be changed into a prime (12122121103) 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, 846571 + ... + 860770.

It is an arithmetic number, because the mean of its divisors is an integer number (740986428).

Almost surely, 2^12122121100 is an apocalyptic number.

12122121100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12122121100 is an abundant number, since it is smaller than the sum of its proper divisors (14553390308).

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

12122121100 is a wasteful number, since it uses less digits than its factorization.

12122121100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1707426 (or 1707419 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 12122121100 its reverse (112122121), we get a palindrome (12234243221).

The spelling of 12122121100 in words is "twelve billion, one hundred twenty-two million, one hundred twenty-one thousand, one hundred".