43122202221 has 16 divisors (see below), whose sum is σ = 66949835904. Its totient is φ = 24176328384.

The previous prime is 43122202213. The next prime is 43122202223. The reversal of 43122202221 is 12220222134.

It is not a de Polignac number, because 43122202221 - 2³ = 43122202213 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43122202223) 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, 19370946 + ... + 19373171.

It is an arithmetic number, because the mean of its divisors is an integer number (4184364744).

Almost surely, 2^43122202221 is an apocalyptic number.

It is an amenable number.

43122202221 is a deficient number, since it is larger than the sum of its proper divisors (23827633683).

43122202221 is a wasteful number, since it uses less digits than its factorization.

43122202221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38744180.

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 43122202221 its reverse (12220222134), we get a palindrome (55342424355).

The spelling of 43122202221 in words is "forty-three billion, one hundred twenty-two million, two hundred two thousand, two hundred twenty-one".