42221727929 has 2 divisors, whose sum is σ = 42221727930. Its totient is φ = 42221727928.

The previous prime is 42221727869. The next prime is 42221727949. The reversal of 42221727929 is 92972712224.

42221727929 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42043452025 + 178275904 = 205045^2 + 13352^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42221727929 is a prime.

It is not a weakly prime, because it can be changed into another prime (42221727949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21110863964 + 21110863965.

It is an arithmetic number, because the mean of its divisors is an integer number (21110863965).

Almost surely, 2^42221727929 is an apocalyptic number.

It is an amenable number.

42221727929 is a deficient number, since it is larger than the sum of its proper divisors (1).

42221727929 is an equidigital number, since it uses as much as digits as its factorization.

42221727929 is an evil number, because the sum of its binary digits is even.

The product of its digits is 508032, while the sum is 47.

The spelling of 42221727929 in words is "forty-two billion, two hundred twenty-one million, seven hundred twenty-seven thousand, nine hundred twenty-nine".