42072999091 has 2 divisors, whose sum is σ = 42072999092. Its totient is φ = 42072999090.

The previous prime is 42072999079. The next prime is 42072999097. The reversal of 42072999091 is 19099927024.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42072999091 - 2¹³ = 42072990899 is a prime.

It is a super-2 number, since 2×42072999091² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (42072999097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21036499545 + 21036499546.

It is an arithmetic number, because the mean of its divisors is an integer number (21036499546).

Almost surely, 2^42072999091 is an apocalyptic number.

42072999091 is a deficient number, since it is larger than the sum of its proper divisors (1).

42072999091 is an equidigital number, since it uses as much as digits as its factorization.

42072999091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 734832, while the sum is 52.

The spelling of 42072999091 in words is "forty-two billion, seventy-two million, nine hundred ninety-nine thousand, ninety-one".