2121122100120 has 32 divisors (see below), whose sum is σ = 6363366300720. Its totient is φ = 565632560000.

The previous prime is 2121122100091. The next prime is 2121122100121. The reversal of 2121122100120 is 210012211212.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 2121122100120.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121122100121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8838008631 + ... + 8838008870.

Almost surely, 2^{2121122100120} is an apocalyptic number.

2121122100120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2121122100120 is an abundant number, since it is smaller than the sum of its proper divisors (4242244200600).

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

2121122100120 is a wasteful number, since it uses less digits than its factorization.

2121122100120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17676017515 (or 17676017511 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 2121122100120 its reverse (210012211212), we get a palindrome (2331134311332).

The spelling of 2121122100120 in words is "two trillion, one hundred twenty-one billion, one hundred twenty-two million, one hundred thousand, one hundred twenty".