121122202002020 has 96 divisors (see below), whose sum is σ = 266944706784000. Its totient is φ = 46075512141824.

The previous prime is 121122202001921. The next prime is 121122202002029. The reversal of 121122202002020 is 20200202221121.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 121122202002020.

It is not an unprimeable number, because it can be changed into a prime (121122202002029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 485434256 + ... + 485683704.

It is an arithmetic number, because the mean of its divisors is an integer number (2780674029000).

Almost surely, 2^{121122202002020} is an apocalyptic number.

121122202002020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121122202002020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (133472353392000).

121122202002020 is an abundant number, since it is smaller than the sum of its proper divisors (145822504781980).

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

121122202002020 is a wasteful number, since it uses less digits than its factorization.

121122202002020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255557 (or 255555 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 121122202002020 its reverse (20200202221121), we get a palindrome (141322404223141).

The spelling of 121122202002020 in words is "one hundred twenty-one trillion, one hundred twenty-two billion, two hundred two million, two thousand, twenty".