2121131233100 has 72 divisors (see below), whose sum is σ = 5073062313648. Its totient is φ = 763368652800.

The previous prime is 2121131233033. The next prime is 2121131233153. The reversal of 2121131233100 is 13321311212.

It is a happy number.

It is a super-2 number, since 2×2121131233100² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 9832997 + ... + 10046396.

Almost surely, 2^{2121131233100} is an apocalyptic number.

2121131233100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2121131233100 is an abundant number, since it is smaller than the sum of its proper divisors (2951931080548).

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

2121131233100 is a wasteful number, since it uses less digits than its factorization.

2121131233100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19879515 (or 19879508 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 2121131233100 its reverse (13321311212), we get a palindrome (2134452544312).

The spelling of 2121131233100 in words is "two trillion, one hundred twenty-one billion, one hundred thirty-one million, two hundred thirty-three thousand, one hundred".