121020020200 has 24 divisors (see below), whose sum is σ = 281371547430. Its totient is φ = 48408008000.

The previous prime is 121020020167. The next prime is 121020020203. The reversal of 121020020200 is 2020020121.

It can be written as a sum of positive squares in 3 ways, for example, as 105777154756 + 15242865444 = 325234^2 + 123462^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (121020020203) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 302549851 + ... + 302550250.

Almost surely, 2^121020020200 is an apocalyptic number.

121020020200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121020020200 is an abundant number, since it is smaller than the sum of its proper divisors (160351527230).

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

121020020200 is a wasteful number, since it uses less digits than its factorization.

121020020200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 605100117 (or 605100108 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 121020020200 its reverse (2020020121), we get a palindrome (123040040321).

The spelling of 121020020200 in words is "one hundred twenty-one billion, twenty million, twenty thousand, two hundred".