1116211231 has 2 divisors, whose sum is σ = 1116211232. Its totient is φ = 1116211230.

The previous prime is 1116211219. The next prime is 1116211273. The reversal of 1116211231 is 1321126111.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1116211231 is a prime.

It is a super-2 number, since 2×1116211231² = 2491855024421070722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1116211199 and 1116211208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1116211631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 558105615 + 558105616.

It is an arithmetic number, because the mean of its divisors is an integer number (558105616).

Almost surely, 2^1116211231 is an apocalyptic number.

1116211231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1116211231 is an equidigital number, since it uses as much as digits as its factorization.

1116211231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72, while the sum is 19.

The square root of 1116211231 is about 33409.7475446912. The cubic root of 1116211231 is about 1037.3264759583.

Adding to 1116211231 its reverse (1321126111), we get a palindrome (2437337342).

The spelling of 1116211231 in words is "one billion, one hundred sixteen million, two hundred eleven thousand, two hundred thirty-one".