43312031121 has 16 divisors (see below), whose sum is σ = 58010465664. Its totient is φ = 28744391424.

The previous prime is 43312031099. The next prime is 43312031159. The reversal of 43312031121 is 12113021334.

It is not a de Polignac number, because 43312031121 - 2²¹ = 43309933969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (43312031221) 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, 675945 + ... + 737241.

It is an arithmetic number, because the mean of its divisors is an integer number (3625654104).

Almost surely, 2^43312031121 is an apocalyptic number.

It is an amenable number.

43312031121 is a deficient number, since it is larger than the sum of its proper divisors (14698434543).

43312031121 is a wasteful number, since it uses less digits than its factorization.

43312031121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62360.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 43312031121 its reverse (12113021334), we get a palindrome (55425052455).

The spelling of 43312031121 in words is "forty-three billion, three hundred twelve million, thirty-one thousand, one hundred twenty-one".