121223223040 has 72 divisors (see below), whose sum is σ = 290595357360. Its totient is φ = 48451239936.

The previous prime is 121223223029. The next prime is 121223223047. The reversal of 121223223040 is 40322322121.

121223223040 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121223223047) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1623651 + ... + 1696669.

It is an arithmetic number, because the mean of its divisors is an integer number (4036046630).

Almost surely, 2^121223223040 is an apocalyptic number.

121223223040 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 121223223040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (145297678680).

121223223040 is an abundant number, since it is smaller than the sum of its proper divisors (169372134320).

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

121223223040 is an equidigital number, since it uses as much as digits as its factorization.

121223223040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74337 (or 74323 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 121223223040 its reverse (40322322121), we get a palindrome (161545545161).

The spelling of 121223223040 in words is "one hundred twenty-one billion, two hundred twenty-three million, two hundred twenty-three thousand, forty".