1011311223 has 16 divisors (see below), whose sum is σ = 1463231616. Its totient is φ = 617591520.

The previous prime is 1011311221. The next prime is 1011311237. The reversal of 1011311223 is 3221131101.

It is a happy number.

It is not a de Polignac number, because 1011311223 - 2¹ = 1011311221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011311221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 93865 + ... + 104082.

It is an arithmetic number, because the mean of its divisors is an integer number (91451976).

Almost surely, 2^1011311223 is an apocalyptic number.

1011311223 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1011311223 is a deficient number, since it is larger than the sum of its proper divisors (451920393).

1011311223 is a wasteful number, since it uses less digits than its factorization.

1011311223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198094.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 1011311223 is about 31801.1198387730. The cubic root of 1011311223 is about 1003.7562803579.

Adding to 1011311223 its reverse (3221131101), we get a palindrome (4232442324).

The spelling of 1011311223 in words is "one billion, eleven million, three hundred eleven thousand, two hundred twenty-three".