12001221023 has 8 divisors (see below), whose sum is σ = 13116447696. Its totient is φ = 10890028800.

The previous prime is 12001221019. The next prime is 12001221031. The reversal of 12001221023 is 32012210021.

It is a happy number.

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 12001221023 - 2² = 12001221019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12001220989 and 12001221007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12001221013) 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, 1002386 + ... + 1014287.

It is an arithmetic number, because the mean of its divisors is an integer number (1639555962).

Almost surely, 2^12001221023 is an apocalyptic number.

12001221023 is a deficient number, since it is larger than the sum of its proper divisors (1115226673).

12001221023 is a wasteful number, since it uses less digits than its factorization.

12001221023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2017225.

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

Adding to 12001221023 its reverse (32012210021), we get a palindrome (44013431044).

The spelling of 12001221023 in words is "twelve billion, one million, two hundred twenty-one thousand, twenty-three".