121043022220 has 96 divisors (see below), whose sum is σ = 276507463680. Its totient is φ = 44339892480.

The previous prime is 121043022169. The next prime is 121043022223. The reversal of 121043022220 is 22220340121.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is not an unprimeable number, because it can be changed into a prime (121043022223) 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, 11574514 + ... + 11584966.

It is an arithmetic number, because the mean of its divisors is an integer number (2880286080).

Almost surely, 2^121043022220 is an apocalyptic number.

121043022220 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 121043022220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (138253731840).

121043022220 is an abundant number, since it is smaller than the sum of its proper divisors (155464441460).

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

121043022220 is a wasteful number, since it uses less digits than its factorization.

121043022220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11495 (or 11493 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 121043022220 its reverse (22220340121), we get a palindrome (143263362341).

The spelling of 121043022220 in words is "one hundred twenty-one billion, forty-three million, twenty-two thousand, two hundred twenty".