121000020020 has 24 divisors (see below), whose sum is σ = 277200046368. Its totient is φ = 44000007200.

The previous prime is 121000020019. The next prime is 121000020059. The reversal of 121000020020 is 20020000121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 274999826 + ... + 275000265.

It is an arithmetic number, because the mean of its divisors is an integer number (11550001932).

Almost surely, 2^121000020020 is an apocalyptic number.

121000020020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121000020020 is an abundant number, since it is smaller than the sum of its proper divisors (156200026348).

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

121000020020 is a wasteful number, since it uses less digits than its factorization.

121000020020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550000111 (or 550000109 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 8.

Adding to 121000020020 its reverse (20020000121), we get a palindrome (141020020141).

The spelling of 121000020020 in words is "one hundred twenty-one billion, twenty thousand, twenty".