12021353222123 has 12 divisors (see below), whose sum is σ = 13985904902760. Its totient is φ = 10302630482592.

The previous prime is 12021353222029. The next prime is 12021353222159. The reversal of 12021353222123 is 32122235312021.

It is a happy number.

It is not a de Polignac number, because 12021353222123 - 2¹⁰ = 12021353221099 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12021353222183) 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, 16138793 + ... + 16867226.

It is an arithmetic number, because the mean of its divisors is an integer number (1165492075230).

Almost surely, 2^{12021353222123} is an apocalyptic number.

12021353222123 is a deficient number, since it is larger than the sum of its proper divisors (1964551680637).

12021353222123 is an equidigital number, since it uses as much as digits as its factorization.

12021353222123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33013466 (or 33013459 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 29.

Adding to 12021353222123 its reverse (32122235312021), we get a palindrome (44143588534144).

The spelling of 12021353222123 in words is "twelve trillion, twenty-one billion, three hundred fifty-three million, two hundred twenty-two thousand, one hundred twenty-three".