121301440 has 84 divisors (see below), whose sum is σ = 312916824. Its totient is φ = 44768256.

The previous prime is 121301387. The next prime is 121301449. The reversal of 121301440 is 44103121.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121301449) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 52959 + ... + 55201.

Almost surely, 2^121301440 is an apocalyptic number.

121301440 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 121301440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (156458412).

121301440 is an abundant number, since it is smaller than the sum of its proper divisors (191615384).

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

121301440 is a wasteful number, since it uses less digits than its factorization.

121301440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2286 (or 2263 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 121301440 is about 11013.6932951667. The cubic root of 121301440 is about 495.0191333624.

Adding to 121301440 its reverse (44103121), we get a palindrome (165404561).

The spelling of 121301440 in words is "one hundred twenty-one million, three hundred one thousand, four hundred forty".