42020244352091 has 2 divisors, whose sum is σ = 42020244352092. Its totient is φ = 42020244352090.

The previous prime is 42020244352081. The next prime is 42020244352157. The reversal of 42020244352091 is 19025344202024.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42020244352091 is a prime.

It is not a weakly prime, because it can be changed into another prime (42020244352001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21010122176045 + 21010122176046.

It is an arithmetic number, because the mean of its divisors is an integer number (21010122176046).

Almost surely, 2^{42020244352091} is an apocalyptic number.

42020244352091 is a deficient number, since it is larger than the sum of its proper divisors (1).

42020244352091 is an equidigital number, since it uses as much as digits as its factorization.

42020244352091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 138240, while the sum is 38.

The spelling of 42020244352091 in words is "forty-two trillion, twenty billion, two hundred forty-four million, three hundred fifty-two thousand, ninety-one".