43012323021 has 16 divisors (see below), whose sum is σ = 59268464640. Its totient is φ = 27717678960.

The previous prime is 43012323019. The next prime is 43012323031. The reversal of 43012323021 is 12032321034.

It is not a de Polignac number, because 43012323021 - 2¹ = 43012323019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43012323001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 187701 + ... + 348218.

It is an arithmetic number, because the mean of its divisors is an integer number (3704279040).

Almost surely, 2^43012323021 is an apocalyptic number.

It is an amenable number.

43012323021 is a deficient number, since it is larger than the sum of its proper divisors (16256141619).

43012323021 is a wasteful number, since it uses less digits than its factorization.

43012323021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 536816.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 43012323021 its reverse (12032321034), we get a palindrome (55044644055).

The spelling of 43012323021 in words is "forty-three billion, twelve million, three hundred twenty-three thousand, twenty-one".