121012021200 has 120 divisors (see below), whose sum is σ = 443019277888. Its totient is φ = 27659888640.

The previous prime is 121012021187. The next prime is 121012021211. The reversal of 121012021200 is 2120210121.

It is a tau number, because it is divible by the number of its divisors (120).

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 polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7194697 + ... + 7211496.

Almost surely, 2^121012021200 is an apocalyptic number.

121012021200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121012021200 is an abundant number, since it is smaller than the sum of its proper divisors (322007256688).

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

121012021200 is a wasteful number, since it uses less digits than its factorization.

121012021200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14406221 (or 14406210 counting only the distinct ones).

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

Adding to 121012021200 its reverse (2120210121), we get a palindrome (123132231321).

The spelling of 121012021200 in words is "one hundred twenty-one billion, twelve million, twenty-one thousand, two hundred".