123021023 has 4 divisors (see below), whose sum is σ = 124503288. Its totient is φ = 121538760.

The previous prime is 123021013. The next prime is 123021047. The reversal of 123021023 is 320120321.

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: 320120321 = 14293 ⋅22397.

It is a cyclic number.

It is not a de Polignac number, because 123021023 - 2⁴ = 123021007 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123020989 and 123021007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123021013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 741008 + ... + 741173.

It is an arithmetic number, because the mean of its divisors is an integer number (31125822).

Almost surely, 2^123021023 is an apocalyptic number.

123021023 is a deficient number, since it is larger than the sum of its proper divisors (1482265).

123021023 is an equidigital number, since it uses as much as digits as its factorization.

123021023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1482264.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 123021023 is about 11091.4842559506. The cubic root of 123021023 is about 497.3473154173.

Adding to 123021023 its reverse (320120321), we get a palindrome (443141344).

The spelling of 123021023 in words is "one hundred twenty-three million, twenty-one thousand, twenty-three".