1112121161 has 2 divisors, whose sum is σ = 1112121162. Its totient is φ = 1112121160.

The previous prime is 1112121107. The next prime is 1112121163. The reversal of 1112121161 is 1611212111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 999761161 + 112360000 = 31619^2 + 10600^2 .

It is a cyclic number.

It is not a de Polignac number, because 1112121161 - 2²² = 1107926857 is a prime.

Together with 1112121163, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1112121163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 556060580 + 556060581.

It is an arithmetic number, because the mean of its divisors is an integer number (556060581).

Almost surely, 2^1112121161 is an apocalyptic number.

It is an amenable number.

1112121161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1112121161 is an equidigital number, since it uses as much as digits as its factorization.

1112121161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24, while the sum is 17.

The square root of 1112121161 is about 33348.4806400532. The cubic root of 1112121161 is about 1036.0579195840.

Adding to 1112121161 its reverse (1611212111), we get a palindrome (2723333272).

The spelling of 1112121161 in words is "one billion, one hundred twelve million, one hundred twenty-one thousand, one hundred sixty-one".