1211104430999 has 2 divisors, whose sum is σ = 1211104431000. Its totient is φ = 1211104430998.

The previous prime is 1211104430959. The next prime is 1211104431007. The reversal of 1211104430999 is 9990344011121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1211104430999 - 2²⁸ = 1210835995543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1211104430929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605552215499 + 605552215500.

It is an arithmetic number, because the mean of its divisors is an integer number (605552215500).

Almost surely, 2^{1211104430999} is an apocalyptic number.

1211104430999 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211104430999 is an equidigital number, since it uses as much as digits as its factorization.

1211104430999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69984, while the sum is 44.

The spelling of 1211104430999 in words is "one trillion, two hundred eleven billion, one hundred four million, four hundred thirty thousand, nine hundred ninety-nine".