1042221031393 has 2 divisors, whose sum is σ = 1042221031394. Its totient is φ = 1042221031392.

The previous prime is 1042221031391. The next prime is 1042221031409. The reversal of 1042221031393 is 3931301222401.

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., 758907549409 + 283313481984 = 871153^2 + 532272^2 .

It is a cyclic number.

It is not a de Polignac number, because 1042221031393 - 2¹ = 1042221031391 is a prime.

Together with 1042221031391, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1042221031391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 521110515696 + 521110515697.

It is an arithmetic number, because the mean of its divisors is an integer number (521110515697).

Almost surely, 2^{1042221031393} is an apocalyptic number.

It is an amenable number.

1042221031393 is a deficient number, since it is larger than the sum of its proper divisors (1).

1042221031393 is an equidigital number, since it uses as much as digits as its factorization.

1042221031393 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 31.

Adding to 1042221031393 its reverse (3931301222401), we get a palindrome (4973522253794).

The spelling of 1042221031393 in words is "one trillion, forty-two billion, two hundred twenty-one million, thirty-one thousand, three hundred ninety-three".