121143040 has 144 divisors (see below), whose sum is σ = 310818816. Its totient is φ = 45158400.

The previous prime is 121143007. The next prime is 121143049. The reversal of 121143040 is 40341121.

It is a super-3 number, since 3×121143040³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

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

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121143049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1706205 + ... + 1706275.

It is an arithmetic number, because the mean of its divisors is an integer number (2158464).

Almost surely, 2^121143040 is an apocalyptic number.

121143040 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 121143040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (155409408).

121143040 is an abundant number, since it is smaller than the sum of its proper divisors (189675776).

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

121143040 is an equidigital number, since it uses as much as digits as its factorization.

121143040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166 (or 152 counting only the distinct ones).

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

The square root of 121143040 is about 11006.4998977877. The cubic root of 121143040 is about 494.8035679462.

Adding to 121143040 its reverse (40341121), we get a palindrome (161484161).

The spelling of 121143040 in words is "one hundred twenty-one million, one hundred forty-three thousand, forty".