1042751407121 has 2 divisors, whose sum is σ = 1042751407122. Its totient is φ = 1042751407120.

The previous prime is 1042751407099. The next prime is 1042751407157. The reversal of 1042751407121 is 1217041572401.

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., 887243428096 + 155507979025 = 941936^2 + 394345^2 .

It is a cyclic number.

It is not a de Polignac number, because 1042751407121 - 2¹⁰ = 1042751406097 is a prime.

It is not a weakly prime, because it can be changed into another prime (1042751406121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 521375703560 + 521375703561.

It is an arithmetic number, because the mean of its divisors is an integer number (521375703561).

Almost surely, 2^{1042751407121} is an apocalyptic number.

It is an amenable number.

1042751407121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1042751407121 is an equidigital number, since it uses as much as digits as its factorization.

1042751407121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15680, while the sum is 35.

Adding to 1042751407121 its reverse (1217041572401), we get a palindrome (2259792979522).

The spelling of 1042751407121 in words is "one trillion, forty-two billion, seven hundred fifty-one million, four hundred seven thousand, one hundred twenty-one".