1145122211 has 2 divisors, whose sum is σ = 1145122212. Its totient is φ = 1145122210.

The previous prime is 1145122201. The next prime is 1145122219. The reversal of 1145122211 is 1122215411.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1145122211 is a prime.

It is a super-2 number, since 2×1145122211² = 2622609756251057042, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1145122219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 572561105 + 572561106.

It is an arithmetic number, because the mean of its divisors is an integer number (572561106).

Almost surely, 2^1145122211 is an apocalyptic number.

1145122211 is a deficient number, since it is larger than the sum of its proper divisors (1).

1145122211 is an equidigital number, since it uses as much as digits as its factorization.

1145122211 is an evil number, because the sum of its binary digits is even.

The product of its digits is 160, while the sum is 20.

The square root of 1145122211 is about 33839.6544160841. The cubic root of 1145122211 is about 1046.2061760664.

Adding to 1145122211 its reverse (1122215411), we get a palindrome (2267337622).

The spelling of 1145122211 in words is "one billion, one hundred forty-five million, one hundred twenty-two thousand, two hundred eleven".