42312221293 has 2 divisors, whose sum is σ = 42312221294. Its totient is φ = 42312221292.

The previous prime is 42312221267. The next prime is 42312221339. The reversal of 42312221293 is 39212221324.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22307513449 + 20004707844 = 149357^2 + 141438^2 .

It is a cyclic number.

It is not a de Polignac number, because 42312221293 - 2⁵ = 42312221261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42312221243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21156110646 + 21156110647.

It is an arithmetic number, because the mean of its divisors is an integer number (21156110647).

Almost surely, 2^42312221293 is an apocalyptic number.

It is an amenable number.

42312221293 is a deficient number, since it is larger than the sum of its proper divisors (1).

42312221293 is an equidigital number, since it uses as much as digits as its factorization.

42312221293 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 31.

Adding to 42312221293 its sum of digits (31), we get a palindrome (42312221324).

The spelling of 42312221293 in words is "forty-two billion, three hundred twelve million, two hundred twenty-one thousand, two hundred ninety-three".