1023003011 has 4 divisors (see below), whose sum is σ = 1023067800. Its totient is φ = 1022938224.

The previous prime is 1023002989. The next prime is 1023003053. The reversal of 1023003011 is 1103003201.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1103003201 = 15461 ⋅71341.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1023003011 is a prime.

It is a super-2 number, since 2×1023003011² = 2093070321030132242, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1023002983 and 1023003001.

It is not an unprimeable number, because it can be changed into a prime (1023006011) 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 3 ways as a sum of consecutive naturals, for example, 8495 + ... + 46023.

It is an arithmetic number, because the mean of its divisors is an integer number (255766950).

Almost surely, 2^1023003011 is an apocalyptic number.

1023003011 is a deficient number, since it is larger than the sum of its proper divisors (64789).

1023003011 is an equidigital number, since it uses as much as digits as its factorization.

1023003011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64788.

The product of its (nonzero) digits is 18, while the sum is 11.

The square root of 1023003011 is about 31984.4182532683. The cubic root of 1023003011 is about 1007.6096171782.

Adding to 1023003011 its reverse (1103003201), we get a palindrome (2126006212).

The spelling of 1023003011 in words is "one billion, twenty-three million, three thousand, eleven".