12102021023 has 4 divisors (see below), whose sum is σ = 12359510880. Its totient is φ = 11844531168.

The previous prime is 12102020999. The next prime is 12102021049. The reversal of 12102021023 is 32012020121.

It is a happy number.

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 12102021023 - 2¹⁴ = 12102004639 is a prime.

It is a super-2 number, since 2×12102021023² (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 = 12102020989 and 12102021007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12102021053) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128744858 + ... + 128744951.

It is an arithmetic number, because the mean of its divisors is an integer number (3089877720).

Almost surely, 2^12102021023 is an apocalyptic number.

12102021023 is a deficient number, since it is larger than the sum of its proper divisors (257489857).

12102021023 is an equidigital number, since it uses as much as digits as its factorization.

12102021023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257489856.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 12102021023 its reverse (32012020121), we get a palindrome (44114041144).

The spelling of 12102021023 in words is "twelve billion, one hundred two million, twenty-one thousand, twenty-three".