121511004244 has 96 divisors (see below), whose sum is σ = 263533374720. Its totient is φ = 47830874112.

The previous prime is 121511004179. The next prime is 121511004257. The reversal of 121511004244 is 442400115121.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34159314 + ... + 34162870.

It is an arithmetic number, because the mean of its divisors is an integer number (2745139320).

Almost surely, 2^121511004244 is an apocalyptic number.

121511004244 is a gapful number since it is divisible by the number (14) 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 121511004244, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (131766687360).

121511004244 is an abundant number, since it is smaller than the sum of its proper divisors (142022370476).

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

121511004244 is a wasteful number, since it uses less digits than its factorization.

121511004244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5297 (or 5295 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 25.

Adding to 121511004244 its reverse (442400115121), we get a palindrome (563911119365).

The spelling of 121511004244 in words is "one hundred twenty-one billion, five hundred eleven million, four thousand, two hundred forty-four".