1121806831 has 2 divisors, whose sum is σ = 1121806832. Its totient is φ = 1121806830.

The previous prime is 1121806823. The next prime is 1121806837. The reversal of 1121806831 is 1386081211.

It is a strong prime.

It is an emirp because it is prime and its reverse (1386081211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1121806831 - 2³ = 1121806823 is a prime.

It is a super-2 number, since 2×1121806831² = 2516901132156525122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1121806793 and 1121806802.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1121806837) 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, 560903415 + 560903416.

It is an arithmetic number, because the mean of its divisors is an integer number (560903416).

Almost surely, 2^1121806831 is an apocalyptic number.

1121806831 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121806831 is an equidigital number, since it uses as much as digits as its factorization.

1121806831 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 31.

The square root of 1121806831 is about 33493.3848841827. The cubic root of 1121806831 is about 1039.0569702931.

The spelling of 1121806831 in words is "one billion, one hundred twenty-one million, eight hundred six thousand, eight hundred thirty-one".