42205133550421 has 2 divisors, whose sum is σ = 42205133550422. Its totient is φ = 42205133550420.

The previous prime is 42205133550401. The next prime is 42205133550451. The reversal of 42205133550421 is 12405533150224.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31746125296900 + 10459008253521 = 5634370^2 + 3234039^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42205133550421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42205133550401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21102566775210 + 21102566775211.

It is an arithmetic number, because the mean of its divisors is an integer number (21102566775211).

Almost surely, 2^{42205133550421} is an apocalyptic number.

It is an amenable number.

42205133550421 is a deficient number, since it is larger than the sum of its proper divisors (1).

42205133550421 is an equidigital number, since it uses as much as digits as its factorization.

42205133550421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144000, while the sum is 37.

The spelling of 42205133550421 in words is "forty-two trillion, two hundred five billion, one hundred thirty-three million, five hundred fifty thousand, four hundred twenty-one".