42130321391 has 2 divisors, whose sum is σ = 42130321392. Its totient is φ = 42130321390.

The previous prime is 42130321267. The next prime is 42130321393. The reversal of 42130321391 is 19312303124.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42130321391 - 2¹⁰ = 42130320367 is a prime.

Together with 42130321393, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42130321393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21065160695 + 21065160696.

It is an arithmetic number, because the mean of its divisors is an integer number (21065160696).

Almost surely, 2^42130321391 is an apocalyptic number.

42130321391 is a deficient number, since it is larger than the sum of its proper divisors (1).

42130321391 is an equidigital number, since it uses as much as digits as its factorization.

42130321391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 29.

The spelling of 42130321391 in words is "forty-two billion, one hundred thirty million, three hundred twenty-one thousand, three hundred ninety-one".