1121111212829 has 2 divisors, whose sum is σ = 1121111212830. Its totient is φ = 1121111212828.

The previous prime is 1121111212763. The next prime is 1121111212847. The reversal of 1121111212829 is 9282121111211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 927220703929 + 193890508900 = 962923^2 + 440330^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1121111212829 is a prime.

It is a super-2 number, since 2×1121111212829² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1121111212795 and 1121111212804.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1121111212849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560555606414 + 560555606415.

It is an arithmetic number, because the mean of its divisors is an integer number (560555606415).

Almost surely, 2^{1121111212829} is an apocalyptic number.

It is an amenable number.

1121111212829 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121111212829 is an equidigital number, since it uses as much as digits as its factorization.

1121111212829 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1152, while the sum is 32.

The spelling of 1121111212829 in words is "one trillion, one hundred twenty-one billion, one hundred eleven million, two hundred twelve thousand, eight hundred twenty-nine".