121021120020200 has 24 divisors (see below), whose sum is σ = 281374104047430. Its totient is φ = 48408448008000.

The previous prime is 121021120020181. The next prime is 121021120020397. The reversal of 121021120020200 is 2020021120121.

It can be written as a sum of positive squares in 3 ways, for example, as 84533938846756 + 36487181173444 = 9194234^2 + 6040462^2 .

It is a super-2 number, since 2×121021120020200² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 302552799851 + ... + 302552800250.

Almost surely, 2^{121021120020200} is an apocalyptic number.

121021120020200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121021120020200 is an abundant number, since it is smaller than the sum of its proper divisors (160352984027230).

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

121021120020200 is a wasteful number, since it uses less digits than its factorization.

121021120020200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 605105600117 (or 605105600108 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 121021120020200 its reverse (2020021120121), we get a palindrome (123041141140321).

The spelling of 121021120020200 in words is "one hundred twenty-one trillion, twenty-one billion, one hundred twenty million, twenty thousand, two hundred".