11311021023 has 16 divisors (see below), whose sum is σ = 15369596640. Its totient is φ = 7396631424.

The previous prime is 11311020997. The next prime is 11311021031. The reversal of 11311021023 is 32012011311.

It is a happy number.

It is not a de Polignac number, because 11311021023 - 2⁵ = 11311020991 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11311020993 and 11311021011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11311021093) 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 15 ways as a sum of consecutive naturals, for example, 1157265 + ... + 1166997.

It is an arithmetic number, because the mean of its divisors is an integer number (960599790).

Almost surely, 2^11311021023 is an apocalyptic number.

11311021023 is a deficient number, since it is larger than the sum of its proper divisors (4058575617).

11311021023 is an equidigital number, since it uses as much as digits as its factorization.

11311021023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17098.

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

Adding to 11311021023 its reverse (32012011311), we get a palindrome (43323032334).

The spelling of 11311021023 in words is "eleven billion, three hundred eleven million, twenty-one thousand, twenty-three".