65043254121 has 4 divisors (see below), whose sum is σ = 86724338832. Its totient is φ = 43362169412.

The previous prime is 65043254069. The next prime is 65043254123. The reversal of 65043254121 is 12145234056.

65043254121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 65043254121 - 2⁷ = 65043253993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (65043254123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10840542351 + ... + 10840542356.

It is an arithmetic number, because the mean of its divisors is an integer number (21681084708).

Almost surely, 2^65043254121 is an apocalyptic number.

It is an amenable number.

65043254121 is a deficient number, since it is larger than the sum of its proper divisors (21681084711).

65043254121 is a wasteful number, since it uses less digits than its factorization.

65043254121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21681084710.

The product of its (nonzero) digits is 28800, while the sum is 33.

Adding to 65043254121 its reverse (12145234056), we get a palindrome (77188488177).

The spelling of 65043254121 in words is "sixty-five billion, forty-three million, two hundred fifty-four thousand, one hundred twenty-one".