43123211101 has 2 divisors, whose sum is σ = 43123211102. Its totient is φ = 43123211100.

The previous prime is 43123211071. The next prime is 43123211123. The reversal of 43123211101 is 10111232134.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22732799076 + 20390412025 = 150774^2 + 142795^2 .

It is a cyclic number.

It is not a de Polignac number, because 43123211101 - 2³³ = 34533276509 is a prime.

It is a super-2 number, since 2×43123211101² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43123211161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21561605550 + 21561605551.

It is an arithmetic number, because the mean of its divisors is an integer number (21561605551).

Almost surely, 2^43123211101 is an apocalyptic number.

It is an amenable number.

43123211101 is a deficient number, since it is larger than the sum of its proper divisors (1).

43123211101 is an equidigital number, since it uses as much as digits as its factorization.

43123211101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 43123211101 its reverse (10111232134), we get a palindrome (53234443235).

The spelling of 43123211101 in words is "forty-three billion, one hundred twenty-three million, two hundred eleven thousand, one hundred one".