1240420212113 has 2 divisors, whose sum is σ = 1240420212114. Its totient is φ = 1240420212112.

The previous prime is 1240420212107. The next prime is 1240420212131. The reversal of 1240420212113 is 3112120240421.

Together with next prime (1240420212131) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 635092643329 + 605327568784 = 796927^2 + 778028^2 .

It is a cyclic number.

It is not a de Polignac number, because 1240420212113 - 2⁶ = 1240420212049 is a prime.

It is not a weakly prime, because it can be changed into another prime (1240420212313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 620210106056 + 620210106057.

It is an arithmetic number, because the mean of its divisors is an integer number (620210106057).

Almost surely, 2^{1240420212113} is an apocalyptic number.

It is an amenable number.

1240420212113 is a deficient number, since it is larger than the sum of its proper divisors (1).

1240420212113 is an equidigital number, since it uses as much as digits as its factorization.

1240420212113 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 1240420212113 its reverse (3112120240421), we get a palindrome (4352540452534).

The spelling of 1240420212113 in words is "one trillion, two hundred forty billion, four hundred twenty million, two hundred twelve thousand, one hundred thirteen".