212021123223 has 16 divisors (see below), whose sum is σ = 347932100096. Its totient is φ = 111835317600.

The previous prime is 212021123219. The next prime is 212021123231. The reversal of 212021123223 is 322321120212.

It is not a de Polignac number, because 212021123223 - 2² = 212021123219 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 212021123223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212021123323) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 388316803 + ... + 388317348.

It is an arithmetic number, because the mean of its divisors is an integer number (21745756256).

Almost surely, 2^212021123223 is an apocalyptic number.

212021123223 is a deficient number, since it is larger than the sum of its proper divisors (135910976873).

212021123223 is a wasteful number, since it uses less digits than its factorization.

212021123223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 776634174.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 212021123223 its reverse (322321120212), we get a palindrome (534342243435).

The spelling of 212021123223 in words is "two hundred twelve billion, twenty-one million, one hundred twenty-three thousand, two hundred twenty-three".