42143221103257 has 2 divisors, whose sum is σ = 42143221103258. Its totient is φ = 42143221103256.

The previous prime is 42143221103251. The next prime is 42143221103311. The reversal of 42143221103257 is 75230112234124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41470650532441 + 672570570816 = 6439771^2 + 820104^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42143221103257 is a prime.

It is not a weakly prime, because it can be changed into another prime (42143221103251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21071610551628 + 21071610551629.

It is an arithmetic number, because the mean of its divisors is an integer number (21071610551629).

Almost surely, 2^{42143221103257} is an apocalyptic number.

It is an amenable number.

42143221103257 is a deficient number, since it is larger than the sum of its proper divisors (1).

42143221103257 is an equidigital number, since it uses as much as digits as its factorization.

42143221103257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80640, while the sum is 37.

The spelling of 42143221103257 in words is "forty-two trillion, one hundred forty-three billion, two hundred twenty-one million, one hundred three thousand, two hundred fifty-seven".