11111021023 has 8 divisors (see below), whose sum is σ = 11471229056. Its totient is φ = 10750924800.

The previous prime is 11111021021. The next prime is 11111021027. The reversal of 11111021023 is 32012011111.

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 11111021023 - 2¹ = 11111021021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11111020994 and 11111021012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11111021021) 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, 204943 + ... + 253423.

It is an arithmetic number, because the mean of its divisors is an integer number (1433903632).

Almost surely, 2^11111021023 is an apocalyptic number.

11111021023 is a deficient number, since it is larger than the sum of its proper divisors (360208033).

11111021023 is an equidigital number, since it uses as much as digits as its factorization.

11111021023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55905.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 11111021023 its reverse (32012011111), we get a palindrome (43123032134).

The spelling of 11111021023 in words is "eleven billion, one hundred eleven million, twenty-one thousand, twenty-three".