111012021023 has 4 divisors (see below), whose sum is σ = 111625347288. Its totient is φ = 110398694760.

The previous prime is 111012021019. The next prime is 111012021097. The reversal of 111012021023 is 320120210111.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 111012021023 - 2² = 111012021019 is a prime.

It is a super-2 number, since 2×111012021023² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111012020989 and 111012021007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111012081023) 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 3 ways as a sum of consecutive naturals, for example, 306662861 + ... + 306663222.

It is an arithmetic number, because the mean of its divisors is an integer number (27906336822).

Almost surely, 2^111012021023 is an apocalyptic number.

111012021023 is a deficient number, since it is larger than the sum of its proper divisors (613326265).

111012021023 is an equidigital number, since it uses as much as digits as its factorization.

111012021023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 613326264.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 111012021023 its reverse (320120210111), we get a palindrome (431132231134).

The spelling of 111012021023 in words is "one hundred eleven billion, twelve million, twenty-one thousand, twenty-three".