121020020220 has 192 divisors, whose sum is σ = 382220697600. Its totient is φ = 28344556800.

The previous prime is 121020020203. The next prime is 121020020243. The reversal of 121020020220 is 22020020121.

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 = 121020020196 and 121020020205.

It is a congruent number.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 13151181 + ... + 13160379.

It is an arithmetic number, because the mean of its divisors is an integer number (1990732800).

Almost surely, 2^121020020220 is an apocalyptic number.

121020020220 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 121020020220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (191110348800).

121020020220 is an abundant number, since it is smaller than the sum of its proper divisors (261200677380).

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

121020020220 is a wasteful number, since it uses less digits than its factorization.

121020020220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9896 (or 9894 counting only the distinct ones).

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

Adding to 121020020220 its reverse (22020020121), we get a palindrome (143040040341).

Subtracting from 121020020220 its reverse (22020020121), we obtain a palindrome (99000000099).

The spelling of 121020020220 in words is "one hundred twenty-one billion, twenty million, twenty thousand, two hundred twenty".