43143221121 has 64 divisors (see below), whose sum is σ = 77919528960. Its totient is φ = 20504816640.

The previous prime is 43143221119. The next prime is 43143221137. The reversal of 43143221121 is 12112234134.

It is not a de Polignac number, because 43143221121 - 2¹ = 43143221119 is a prime.

It is a super-2 number, since 2×43143221121² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 43143221091 and 43143221100.

It is not an unprimeable number, because it can be changed into a prime (43143221171) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 275770 + ... + 402908.

It is an arithmetic number, because the mean of its divisors is an integer number (1217492640).

Almost surely, 2^43143221121 is an apocalyptic number.

It is an amenable number.

43143221121 is a deficient number, since it is larger than the sum of its proper divisors (34776307839).

43143221121 is a wasteful number, since it uses less digits than its factorization.

43143221121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127286.

The product of its digits is 1152, while the sum is 24.

Adding to 43143221121 its reverse (12112234134), we get a palindrome (55255455255).

The spelling of 43143221121 in words is "forty-three billion, one hundred forty-three million, two hundred twenty-one thousand, one hundred twenty-one".