43212121158 has 16 divisors (see below), whose sum is σ = 86472734976. Its totient is φ = 14395958280.

The previous prime is 43212121157. The next prime is 43212121159. The reversal of 43212121158 is 85112121234.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (43212121157) and next prime (43212121159).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43212121157) 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, 2008938 + ... + 2030333.

It is an arithmetic number, because the mean of its divisors is an integer number (5404545936).

Almost surely, 2^43212121158 is an apocalyptic number.

43212121158 is an abundant number, since it is smaller than the sum of its proper divisors (43260613818).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

43212121158 is a wasteful number, since it uses less digits than its factorization.

43212121158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4041059.

The product of its digits is 3840, while the sum is 30.

The spelling of 43212121158 in words is "forty-three billion, two hundred twelve million, one hundred twenty-one thousand, one hundred fifty-eight".