121200220220020 has 12 divisors (see below), whose sum is σ = 254520462462084. Its totient is φ = 48480088088000.

The previous prime is 121200220220011. The next prime is 121200220220039. The reversal of 121200220220020 is 20022022002121.

It can be written as a sum of positive squares in 2 ways, for example, as 24858221583204 + 96341998636816 = 4985802^2 + 9815396^2 .

It is a junction number, because it is equal to n+sod(n) for n = 121200220219976 and 121200220220003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3030005505481 + ... + 3030005505520.

It is an arithmetic number, because the mean of its divisors is an integer number (21210038538507).

Almost surely, 2^{121200220220020} is an apocalyptic number.

121200220220020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121200220220020 is an abundant number, since it is smaller than the sum of its proper divisors (133320242242064).

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

121200220220020 is a wasteful number, since it uses less digits than its factorization.

121200220220020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6060011011010 (or 6060011011008 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 121200220220020 its reverse (20022022002121), we get a palindrome (141222242222141).

The spelling of 121200220220020 in words is "one hundred twenty-one trillion, two hundred billion, two hundred twenty million, two hundred twenty thousand, twenty".