1242334112521 has 2 divisors, whose sum is σ = 1242334112522. Its totient is φ = 1242334112520.

The previous prime is 1242334112497. The next prime is 1242334112563. The reversal of 1242334112521 is 1252114332421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1226857508496 + 15476604025 = 1107636^2 + 124405^2 .

It is an emirp because it is prime and its reverse (1252114332421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1242334112521 - 2⁵ = 1242334112489 is a prime.

It is not a weakly prime, because it can be changed into another prime (1242334112021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621167056260 + 621167056261.

It is an arithmetic number, because the mean of its divisors is an integer number (621167056261).

Almost surely, 2^{1242334112521} is an apocalyptic number.

It is an amenable number.

1242334112521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242334112521 is an equidigital number, since it uses as much as digits as its factorization.

1242334112521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11520, while the sum is 31.

Adding to 1242334112521 its reverse (1252114332421), we get a palindrome (2494448444942).

The spelling of 1242334112521 in words is "one trillion, two hundred forty-two billion, three hundred thirty-four million, one hundred twelve thousand, five hundred twenty-one".