212021121223 has 4 divisors (see below), whose sum is σ = 212027160928. Its totient is φ = 212015081520.

The previous prime is 212021121199. The next prime is 212021121227. The reversal of 212021121223 is 322121120212.

212021121223 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 212021121223 - 2⁹ = 212021120711 is a prime.

It is a super-2 number, since 2×212021121223² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 212021121223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212021121227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2966886 + ... + 3037507.

It is an arithmetic number, because the mean of its divisors is an integer number (53006790232).

Almost surely, 2^212021121223 is an apocalyptic number.

212021121223 is a deficient number, since it is larger than the sum of its proper divisors (6039705).

212021121223 is an equidigital number, since it uses as much as digits as its factorization.

212021121223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6039704.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 212021121223 its reverse (322121120212), we get a palindrome (534142241435).

The spelling of 212021121223 in words is "two hundred twelve billion, twenty-one million, one hundred twenty-one thousand, two hundred twenty-three".