12021023 has 12 divisors (see below), whose sum is σ = 14807232. Its totient is φ = 9696960.

The previous prime is 12021017. The next prime is 12021029. The reversal of 12021023 is 32012021.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12021017) and next prime (12021029).

It is not a de Polignac number, because 12021023 - 2⁴ = 12021007 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12020995 and 12021013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12021029) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6383 + ... + 8048.

It is an arithmetic number, because the mean of its divisors is an integer number (1233936).

Almost surely, 2^12021023 is an apocalyptic number.

12021023 is a deficient number, since it is larger than the sum of its proper divisors (2786209).

12021023 is a wasteful number, since it uses less digits than its factorization.

12021023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14462 (or 14455 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 12021023 is about 3467.1346959701. The cubic root of 12021023 is about 229.0764667757.

Adding to 12021023 its reverse (32012021), we get a palindrome (44033044).

The spelling of 12021023 in words is "twelve million, twenty-one thousand, twenty-three".