43121100245 has 8 divisors (see below), whose sum is σ = 52721647416. Its totient is φ = 33845995456.

The previous prime is 43121100233. The next prime is 43121100251. The reversal of 43121100245 is 54200112134.

43121100245 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 14776347364 + 28344752881 = 121558^2 + 168359^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 43121100245 - 2¹² = 43121096149 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 43121100245.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81360302 + ... + 81360831.

It is an arithmetic number, because the mean of its divisors is an integer number (6590205927).

Almost surely, 2^43121100245 is an apocalyptic number.

It is an amenable number.

43121100245 is a deficient number, since it is larger than the sum of its proper divisors (9600547171).

43121100245 is a wasteful number, since it uses less digits than its factorization.

43121100245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162721191.

The product of its (nonzero) digits is 960, while the sum is 23.

Adding to 43121100245 its reverse (54200112134), we get a palindrome (97321212379).

The spelling of 43121100245 in words is "forty-three billion, one hundred twenty-one million, one hundred thousand, two hundred forty-five".