121220221302 has 80 divisors (see below), whose sum is σ = 281289919680. Its totient is φ = 38991356208.

The previous prime is 121220221271. The next prime is 121220221303. The reversal of 121220221302 is 203122022121.

121220221302 is a `hidden beast` number, since 121 + 2 + 20 + 221 + 302 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121220221303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 473349 + ... + 683007.

It is an arithmetic number, because the mean of its divisors is an integer number (3516123996).

Almost surely, 2^121220221302 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121220221302, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (140644959840).

121220221302 is an abundant number, since it is smaller than the sum of its proper divisors (160069698378).

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

121220221302 is a wasteful number, since it uses less digits than its factorization.

121220221302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209799 (or 209790 counting only the distinct ones).

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

Adding to 121220221302 its reverse (203122022121), we get a palindrome (324342243423).

The spelling of 121220221302 in words is "one hundred twenty-one billion, two hundred twenty million, two hundred twenty-one thousand, three hundred two".