42129210667 has 2 divisors, whose sum is σ = 42129210668. Its totient is φ = 42129210666.

The previous prime is 42129210661. The next prime is 42129210691. The reversal of 42129210667 is 76601292124.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42129210667 - 2³ = 42129210659 is a prime.

It is not a weakly prime, because it can be changed into another prime (42129210661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21064605333 + 21064605334.

It is an arithmetic number, because the mean of its divisors is an integer number (21064605334).

Almost surely, 2^42129210667 is an apocalyptic number.

42129210667 is a deficient number, since it is larger than the sum of its proper divisors (1).

42129210667 is an equidigital number, since it uses as much as digits as its factorization.

42129210667 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 40.

The spelling of 42129210667 in words is "forty-two billion, one hundred twenty-nine million, two hundred ten thousand, six hundred sixty-seven".