12021111023 has 8 divisors (see below), whose sum is σ = 12546790368. Its totient is φ = 11495683584.

The previous prime is 12021111019. The next prime is 12021111049. The reversal of 12021111023 is 32011112021.

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 12021111023 - 2² = 12021111019 is a prime.

It is a super-2 number, since 2×12021111023² (a number of 21 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 = 12021110989 and 12021111007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12021111073) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38015 + ... + 159647.

It is an arithmetic number, because the mean of its divisors is an integer number (1568348796).

Almost surely, 2^12021111023 is an apocalyptic number.

12021111023 is a deficient number, since it is larger than the sum of its proper divisors (525679345).

12021111023 is a wasteful number, since it uses less digits than its factorization.

12021111023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125953.

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

Adding to 12021111023 its reverse (32011112021), we get a palindrome (44032223044).

The spelling of 12021111023 in words is "twelve billion, twenty-one million, one hundred eleven thousand, twenty-three".