1023111311 has 8 divisors (see below), whose sum is σ = 1042889904. Its totient is φ = 1003350400.

The previous prime is 1023111301. The next prime is 1023111343. The reversal of 1023111311 is 1131113201.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1023111311 - 2¹⁸ = 1022849167 is a prime.

It is a super-2 number, since 2×1023111311² = 2093513509392277442, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1023111301) 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 in 7 ways as a sum of consecutive naturals, for example, 227636 + ... + 232086.

It is an arithmetic number, because the mean of its divisors is an integer number (130361238).

Almost surely, 2^1023111311 is an apocalyptic number.

1023111311 is a deficient number, since it is larger than the sum of its proper divisors (19778593).

1023111311 is an equidigital number, since it uses as much as digits as its factorization.

1023111311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8841.

The product of its (nonzero) digits is 18, while the sum is 14.

The square root of 1023111311 is about 31986.1112203406. Note that the first 3 decimals coincide. The cubic root of 1023111311 is about 1007.6451727174.

Adding to 1023111311 its reverse (1131113201), we get a palindrome (2154224512).

The spelling of 1023111311 in words is "one billion, twenty-three million, one hundred eleven thousand, three hundred eleven".