121212002100 has 72 divisors (see below), whose sum is σ = 400807693888. Its totient is φ = 27705600000.

The previous prime is 121212002099. The next prime is 121212002113. The reversal of 121212002100 is 1200212121.

121212002100 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 a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 28857901 + ... + 28862100.

Almost surely, 2^121212002100 is an apocalyptic number.

121212002100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121212002100 is an abundant number, since it is smaller than the sum of its proper divisors (279595691788).

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

121212002100 is a wasteful number, since it uses less digits than its factorization.

121212002100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57720025 (or 57720018 counting only the distinct ones).

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

Adding to 121212002100 its reverse (1200212121), we get a palindrome (122412214221).

The spelling of 121212002100 in words is "one hundred twenty-one billion, two hundred twelve million, two thousand, one hundred".