42420202291 has 2 divisors, whose sum is σ = 42420202292. Its totient is φ = 42420202290.

The previous prime is 42420202243. The next prime is 42420202337. The reversal of 42420202291 is 19220202424.

42420202291 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 is a cyclic number.

It is not a de Polignac number, because 42420202291 - 2¹⁹ = 42419678003 is a prime.

It is not a weakly prime, because it can be changed into another prime (42420202241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21210101145 + 21210101146.

It is an arithmetic number, because the mean of its divisors is an integer number (21210101146).

Almost surely, 2^42420202291 is an apocalyptic number.

42420202291 is a deficient number, since it is larger than the sum of its proper divisors (1).

42420202291 is an equidigital number, since it uses as much as digits as its factorization.

42420202291 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 28.

The spelling of 42420202291 in words is "forty-two billion, four hundred twenty million, two hundred two thousand, two hundred ninety-one".