121013053440 has 96 divisors (see below), whose sum is σ = 387147327840. Its totient is φ = 32270139392.

The previous prime is 121013053429. The next prime is 121013053547. The reversal of 121013053440 is 44350310121.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 121013053440.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1938894 + ... + 2000333.

It is an arithmetic number, because the mean of its divisors is an integer number (4032784665).

Almost surely, 2^121013053440 is an apocalyptic number.

121013053440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121013053440 is an abundant number, since it is smaller than the sum of its proper divisors (266134274400).

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

121013053440 is an equidigital number, since it uses as much as digits as its factorization.

121013053440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3939257 (or 3939237 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

Adding to 121013053440 its reverse (44350310121), we get a palindrome (165363363561).

The spelling of 121013053440 in words is "one hundred twenty-one billion, thirteen million, fifty-three thousand, four hundred forty".