12021011011223 has 4 divisors (see below), whose sum is σ = 12044909641968. Its totient is φ = 11997112380480.

The previous prime is 12021011011201. The next prime is 12021011011231. The reversal of 12021011011223 is 32211011012021.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12021011011223 is a prime.

It is a super-2 number, since 2×12021011011223² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12021011014223) 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, 11949314618 + ... + 11949315623.

It is an arithmetic number, because the mean of its divisors is an integer number (3011227410492).

Almost surely, 2^{12021011011223} is an apocalyptic number.

12021011011223 is a deficient number, since it is larger than the sum of its proper divisors (23898630745).

12021011011223 is an equidigital number, since it uses as much as digits as its factorization.

12021011011223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23898630744.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 12021011011223 its reverse (32211011012021), we get a palindrome (44232022023244).

The spelling of 12021011011223 in words is "twelve trillion, twenty-one billion, eleven million, eleven thousand, two hundred twenty-three".