1242553615811 has 2 divisors, whose sum is σ = 1242553615812. Its totient is φ = 1242553615810.

The previous prime is 1242553615757. The next prime is 1242553615847. The reversal of 1242553615811 is 1185163552421.

It is a strong prime.

It is an emirp because it is prime and its reverse (1185163552421) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1242553615811 is a prime.

It is not a weakly prime, because it can be changed into another prime (1242553615871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621276807905 + 621276807906.

It is an arithmetic number, because the mean of its divisors is an integer number (621276807906).

Almost surely, 2^{1242553615811} is an apocalyptic number.

1242553615811 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242553615811 is an equidigital number, since it uses as much as digits as its factorization.

1242553615811 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 288000, while the sum is 44.

The spelling of 1242553615811 in words is "one trillion, two hundred forty-two billion, five hundred fifty-three million, six hundred fifteen thousand, eight hundred eleven".