1152820123111 has 2 divisors, whose sum is σ = 1152820123112. Its totient is φ = 1152820123110.

The previous prime is 1152820123087. The next prime is 1152820123121. The reversal of 1152820123111 is 1113210282511.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1152820123111 is a prime.

It is a super-2 number, since 2×1152820123111² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1152820123111.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1152820123121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 576410061555 + 576410061556.

It is an arithmetic number, because the mean of its divisors is an integer number (576410061556).

Almost surely, 2^{1152820123111} is an apocalyptic number.

1152820123111 is a deficient number, since it is larger than the sum of its proper divisors (1).

1152820123111 is an equidigital number, since it uses as much as digits as its factorization.

1152820123111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 960, while the sum is 28.

The spelling of 1152820123111 in words is "one trillion, one hundred fifty-two billion, eight hundred twenty million, one hundred twenty-three thousand, one hundred eleven".