11011311023 has 4 divisors (see below), whose sum is σ = 11081446920. Its totient is φ = 10941175128.

The previous prime is 11011310987. The next prime is 11011311029. The reversal of 11011311023 is 32011311011.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32011311011 = 1009 ⋅31725779.

It is a cyclic number.

It is not a de Polignac number, because 11011311023 - 2⁸ = 11011310767 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11011310989 and 11011311007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11011311029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35067713 + ... + 35068026.

It is an arithmetic number, because the mean of its divisors is an integer number (2770361730).

Almost surely, 2^11011311023 is an apocalyptic number.

11011311023 is a deficient number, since it is larger than the sum of its proper divisors (70135897).

11011311023 is an equidigital number, since it uses as much as digits as its factorization.

11011311023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70135896.

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

Adding to 11011311023 its reverse (32011311011), we get a palindrome (43022622034).

The spelling of 11011311023 in words is "eleven billion, eleven million, three hundred eleven thousand, twenty-three".