1010042191 has 2 divisors, whose sum is σ = 1010042192. Its totient is φ = 1010042190.

The previous prime is 1010042177. The next prime is 1010042273. The reversal of 1010042191 is 1912400101.

It is a weak prime.

It is an emirp because it is prime and its reverse (1912400101) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1010042191 - 2¹⁹ = 1009517903 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1010042101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505021095 + 505021096.

It is an arithmetic number, because the mean of its divisors is an integer number (505021096).

Almost surely, 2^1010042191 is an apocalyptic number.

1010042191 is a deficient number, since it is larger than the sum of its proper divisors (1).

1010042191 is an equidigital number, since it uses as much as digits as its factorization.

1010042191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 19.

The square root of 1010042191 is about 31781.1609448113. The cubic root of 1010042191 is about 1003.3362540309.

Adding to 1010042191 its reverse (1912400101), we get a palindrome (2922442292).

The spelling of 1010042191 in words is "one billion, ten million, forty-two thousand, one hundred ninety-one".