121220000020020 has 48 divisors (see below), whose sum is σ = 370272000063168. Its totient is φ = 29386666671360.

The previous prime is 121220000020003. The next prime is 121220000020033. The reversal of 121220000020020 is 20020000022121.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 121220000019978 and 121220000020005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91833332689 + ... + 91833334008.

It is an arithmetic number, because the mean of its divisors is an integer number (7714000001316).

Almost surely, 2^{121220000020020} is an apocalyptic number.

121220000020020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121220000020020 is an abundant number, since it is smaller than the sum of its proper divisors (249052000043148).

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

121220000020020 is a wasteful number, since it uses less digits than its factorization.

121220000020020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183666666720 (or 183666666718 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 121220000020020 its reverse (20020000022121), we get a palindrome (141240000042141).

The spelling of 121220000020020 in words is "one hundred twenty-one trillion, two hundred twenty billion, twenty thousand, twenty".