43042632121 has 2 divisors, whose sum is σ = 43042632122. Its totient is φ = 43042632120.

The previous prime is 43042632119. The next prime is 43042632133. The reversal of 43042632121 is 12123624034.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42964998400 + 77633721 = 207280^2 + 8811^2 .

It is a cyclic number.

It is not a de Polignac number, because 43042632121 - 2¹ = 43042632119 is a prime.

Together with 43042632119, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 43042632121.

It is not a weakly prime, because it can be changed into another prime (43042632421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21521316060 + 21521316061.

It is an arithmetic number, because the mean of its divisors is an integer number (21521316061).

Almost surely, 2^43042632121 is an apocalyptic number.

It is an amenable number.

43042632121 is a deficient number, since it is larger than the sum of its proper divisors (1).

43042632121 is an equidigital number, since it uses as much as digits as its factorization.

43042632121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 28.

The spelling of 43042632121 in words is "forty-three billion, forty-two million, six hundred thirty-two thousand, one hundred twenty-one".