1151220223 has 2 divisors, whose sum is σ = 1151220224. Its totient is φ = 1151220222.

The previous prime is 1151220143. The next prime is 1151220227. The reversal of 1151220223 is 3220221511.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1151220223 - 2²¹ = 1149123071 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1151220223.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1151220227) 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, 575610111 + 575610112.

It is an arithmetic number, because the mean of its divisors is an integer number (575610112).

Almost surely, 2^1151220223 is an apocalyptic number.

1151220223 is a deficient number, since it is larger than the sum of its proper divisors (1).

1151220223 is an equidigital number, since it uses as much as digits as its factorization.

1151220223 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 1151220223 is about 33929.6363523101. The cubic root of 1151220223 is about 1048.0599772285.

Adding to 1151220223 its reverse (3220221511), we get a palindrome (4371441734).

The spelling of 1151220223 in words is "one billion, one hundred fifty-one million, two hundred twenty thousand, two hundred twenty-three".