43121243012 has 24 divisors (see below), whose sum is σ = 75991360704. Its totient is φ = 21409689312.

The previous prime is 43121242999. The next prime is 43121243017. The reversal of 43121243012 is 21034212134.

It is not an unprimeable number, because it can be changed into a prime (43121243017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 633623 + ... + 698369.

It is an arithmetic number, because the mean of its divisors is an integer number (3166306696).

Almost surely, 2^43121243012 is an apocalyptic number.

It is an amenable number.

43121243012 is a deficient number, since it is larger than the sum of its proper divisors (32870117692).

43121243012 is a wasteful number, since it uses less digits than its factorization.

43121243012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65915 (or 65913 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 43121243012 its reverse (21034212134), we get a palindrome (64155455146).

The spelling of 43121243012 in words is "forty-three billion, one hundred twenty-one million, two hundred forty-three thousand, twelve".