121220203122 has 192 divisors, whose sum is σ = 285999158016. Its totient is φ = 37006295040.

The previous prime is 121220203109. The next prime is 121220203133. The reversal of 121220203122 is 221302022121.

121220203122 is a `hidden beast` number, since 121 + 220 + 203 + 122 = 666.

121220203122 is digitally balanced in base 7, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 121220203095 and 121220203104.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 387284838 + ... + 387285150.

It is an arithmetic number, because the mean of its divisors is an integer number (1489578948).

Almost surely, 2^121220203122 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121220203122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (142999579008).

121220203122 is an abundant number, since it is smaller than the sum of its proper divisors (164778954894).

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

121220203122 is a wasteful number, since it uses less digits than its factorization.

121220203122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 705 (or 702 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 121220203122 its reverse (221302022121), we get a palindrome (342522225243).

The spelling of 121220203122 in words is "one hundred twenty-one billion, two hundred twenty million, two hundred three thousand, one hundred twenty-two".