212021130223 has 4 divisors (see below), whose sum is σ = 242309863120. Its totient is φ = 181732397328.

The previous prime is 212021130203. The next prime is 212021130271. The reversal of 212021130223 is 322031120212.

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 212021130223 - 2¹³ = 212021122031 is a prime.

It is a super-2 number, since 2×212021130223² (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 212021130223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212021130203) 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, 15144366438 + ... + 15144366451.

It is an arithmetic number, because the mean of its divisors is an integer number (60577465780).

Almost surely, 2^212021130223 is an apocalyptic number.

212021130223 is a deficient number, since it is larger than the sum of its proper divisors (30288732897).

212021130223 is an equidigital number, since it uses as much as digits as its factorization.

212021130223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30288732896.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 212021130223 its reverse (322031120212), we get a palindrome (534052250435).

The spelling of 212021130223 in words is "two hundred twelve billion, twenty-one million, one hundred thirty thousand, two hundred twenty-three".