121000222220020 has 96 divisors (see below), whose sum is σ = 298526839099776. Its totient is φ = 40615021939200.

The previous prime is 121000222219993. The next prime is 121000222220023. The reversal of 121000222220020 is 20022222000121.

It is a junction number, because it is equal to n+sod(n) for n = 121000222219976 and 121000222220003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121000222220023) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 371554302 + ... + 371879818.

It is an arithmetic number, because the mean of its divisors is an integer number (3109654573956).

Almost surely, 2^{121000222220020} is an apocalyptic number.

121000222220020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121000222220020 is an abundant number, since it is smaller than the sum of its proper divisors (177526616879756).

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

121000222220020 is a wasteful number, since it uses less digits than its factorization.

121000222220020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 455521 (or 455519 counting only the distinct ones).

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

Adding to 121000222220020 its reverse (20022222000121), we get a palindrome (141022444220141).

The spelling of 121000222220020 in words is "one hundred twenty-one trillion, two hundred twenty-two million, two hundred twenty thousand, twenty".