121134440 has 64 divisors (see below), whose sum is σ = 318764160. Its totient is φ = 40561920.

The previous prime is 121134439. The next prime is 121134457. The reversal of 121134440 is 44431121.

It is a super-2 number, since 2×121134440² = 29347105108227200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7010 + ... + 17070.

It is an arithmetic number, because the mean of its divisors is an integer number (4980690).

Almost surely, 2^121134440 is an apocalyptic number.

121134440 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 121134440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (159382080).

121134440 is an abundant number, since it is smaller than the sum of its proper divisors (197629720).

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

121134440 is a wasteful number, since it uses less digits than its factorization.

121134440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10122 (or 10118 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 121134440 is about 11006.1092126146. The cubic root of 121134440 is about 494.7918588916.

Adding to 121134440 its reverse (44431121), we get a palindrome (165565561).

The spelling of 121134440 in words is "one hundred twenty-one million, one hundred thirty-four thousand, four hundred forty".