121200100212 has 48 divisors (see below), whose sum is σ = 292163784192. Its totient is φ = 39064535040.

The previous prime is 121200100207. The next prime is 121200100223. The reversal of 121200100212 is 212001002121.

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 (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 318868 + ... + 586580.

It is an arithmetic number, because the mean of its divisors is an integer number (6086745504).

Almost surely, 2^121200100212 is an apocalyptic number.

121200100212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121200100212 is an abundant number, since it is smaller than the sum of its proper divisors (170963683980).

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

121200100212 is a wasteful number, since it uses less digits than its factorization.

121200100212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268968 (or 268966 counting only the distinct ones).

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

Adding to 121200100212 its reverse (212001002121), we get a palindrome (333201102333).

The spelling of 121200100212 in words is "one hundred twenty-one billion, two hundred million, one hundred thousand, two hundred twelve".