871223011 has 2 divisors, whose sum is σ = 871223012. Its totient is φ = 871223010.

The previous prime is 871222999. The next prime is 871223069. The reversal of 871223011 is 110322178.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 871223011 - 2¹³ = 871214819 is a prime.

It is a super-2 number, since 2×871223011² = 1518059069791812242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (871223081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 435611505 + 435611506.

It is an arithmetic number, because the mean of its divisors is an integer number (435611506).

Almost surely, 2^871223011 is an apocalyptic number.

871223011 is a deficient number, since it is larger than the sum of its proper divisors (1).

871223011 is an equidigital number, since it uses as much as digits as its factorization.

871223011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 871223011 is about 29516.4871046675. The cubic root of 871223011 is about 955.0873931152.

Adding to 871223011 its reverse (110322178), we get a palindrome (981545189).

The spelling of 871223011 in words is "eight hundred seventy-one million, two hundred twenty-three thousand, eleven".