121220203332 has 96 divisors (see below), whose sum is σ = 300697173504. Its totient is φ = 37876326400.

The previous prime is 121220203289. The next prime is 121220203337. The reversal of 121220203332 is 233302022121.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 121220203299 and 121220203308.

It is not an unprimeable number, because it can be changed into a prime (121220203337) 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, 89066332 + ... + 89067692.

It is an arithmetic number, because the mean of its divisors is an integer number (3132262224).

Almost surely, 2^121220203332 is an apocalyptic number.

121220203332 is a gapful number since it is divisible by the number (12) 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 121220203332, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (150348586752).

121220203332 is an abundant number, since it is smaller than the sum of its proper divisors (179476970172).

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

121220203332 is a wasteful number, since it uses less digits than its factorization.

121220203332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2829 (or 2827 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 121220203332 its reverse (233302022121), we get a palindrome (354522225453).

The spelling of 121220203332 in words is "one hundred twenty-one billion, two hundred twenty million, two hundred three thousand, three hundred thirty-two".