42030012091 has 2 divisors, whose sum is σ = 42030012092. Its totient is φ = 42030012090.

The previous prime is 42030012083. The next prime is 42030012137. The reversal of 42030012091 is 19021003024.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42030012091 - 2³ = 42030012083 is a prime.

It is not a weakly prime, because it can be changed into another prime (42030012041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21015006045 + 21015006046.

It is an arithmetic number, because the mean of its divisors is an integer number (21015006046).

Almost surely, 2^42030012091 is an apocalyptic number.

42030012091 is a deficient number, since it is larger than the sum of its proper divisors (1).

42030012091 is an equidigital number, since it uses as much as digits as its factorization.

42030012091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 22.

The spelling of 42030012091 in words is "forty-two billion, thirty million, twelve thousand, ninety-one".