12121231100 has 36 divisors (see below), whose sum is σ = 28694262408. Its totient is φ = 4407720000.

The previous prime is 12121231063. The next prime is 12121231139. The reversal of 12121231100 is 113212121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5508551 + ... + 5510750.

Almost surely, 2^12121231100 is an apocalyptic number.

12121231100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12121231100 is an abundant number, since it is smaller than the sum of its proper divisors (16573031308).

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

12121231100 is a wasteful number, since it uses less digits than its factorization.

12121231100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11019326 (or 11019319 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 12121231100 its reverse (113212121), we get a palindrome (12234443221).

The spelling of 12121231100 in words is "twelve billion, one hundred twenty-one million, two hundred thirty-one thousand, one hundred".