1229791815011 has 2 divisors, whose sum is σ = 1229791815012. Its totient is φ = 1229791815010.

The previous prime is 1229791814971. The next prime is 1229791815029. The reversal of 1229791815011 is 1105181979221.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1229791815011 - 2³⁴ = 1212611945827 is a prime.

It is not a weakly prime, because it can be changed into another prime (1229791815061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 614895907505 + 614895907506.

It is an arithmetic number, because the mean of its divisors is an integer number (614895907506).

Almost surely, 2^{1229791815011} is an apocalyptic number.

1229791815011 is a deficient number, since it is larger than the sum of its proper divisors (1).

1229791815011 is an equidigital number, since it uses as much as digits as its factorization.

1229791815011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 47.

The spelling of 1229791815011 in words is "one trillion, two hundred twenty-nine billion, seven hundred ninety-one million, eight hundred fifteen thousand, eleven".