121020212100 has 36 divisors (see below), whose sum is σ = 350151814544. Its totient is φ = 32272056480.

The previous prime is 121020212099. The next prime is 121020212111. The reversal of 121020212100 is 1212020121.

121020212100 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 201700054 + ... + 201700653.

Almost surely, 2^121020212100 is an apocalyptic number.

121020212100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121020212100 is an abundant number, since it is smaller than the sum of its proper divisors (229131602444).

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

121020212100 is a wasteful number, since it uses less digits than its factorization.

121020212100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403400724 (or 403400717 counting only the distinct ones).

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

Adding to 121020212100 its reverse (1212020121), we get a palindrome (122232232221).

The spelling of 121020212100 in words is "one hundred twenty-one billion, twenty million, two hundred twelve thousand, one hundred".