42021140191 has 2 divisors, whose sum is σ = 42021140192. Its totient is φ = 42021140190.

The previous prime is 42021140177. The next prime is 42021140201. The reversal of 42021140191 is 19104112024.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42021140191 - 2³⁵ = 7661401823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42021540191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21010570095 + 21010570096.

It is an arithmetic number, because the mean of its divisors is an integer number (21010570096).

Almost surely, 2^42021140191 is an apocalyptic number.

42021140191 is a deficient number, since it is larger than the sum of its proper divisors (1).

42021140191 is an equidigital number, since it uses as much as digits as its factorization.

42021140191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 25.

The spelling of 42021140191 in words is "forty-two billion, twenty-one million, one hundred forty thousand, one hundred ninety-one".