121434344240 has 160 divisors (see below), whose sum is σ = 329352402240. Its totient is φ = 41148416000.

The previous prime is 121434344201. The next prime is 121434344243. The reversal of 121434344240 is 42443434121.

It is a junction number, because it is equal to n+sod(n) for n = 121434344197 and 121434344206.

It is not an unprimeable number, because it can be changed into a prime (121434344243) 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, 1470776 + ... + 1551144.

It is an arithmetic number, because the mean of its divisors is an integer number (2058452514).

Almost surely, 2^121434344240 is an apocalyptic number.

121434344240 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 121434344240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (164676201120).

121434344240 is an abundant number, since it is smaller than the sum of its proper divisors (207918058000).

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

121434344240 is a wasteful number, since it uses less digits than its factorization.

121434344240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80511 (or 80505 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 32.

Adding to 121434344240 its reverse (42443434121), we get a palindrome (163877778361).

The spelling of 121434344240 in words is "one hundred twenty-one billion, four hundred thirty-four million, three hundred forty-four thousand, two hundred forty".