212021021323 has 4 divisors (see below), whose sum is σ = 212029674808. Its totient is φ = 212012367840.

The previous prime is 212021021297. The next prime is 212021021357. The reversal of 212021021323 is 323120120212.

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 212021021323 - 2⁹ = 212021020811 is a prime.

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 212021021323.

It is not an unprimeable number, because it can be changed into a prime (212021061323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4289886 + ... + 4339027.

It is an arithmetic number, because the mean of its divisors is an integer number (53007418702).

Almost surely, 2^212021021323 is an apocalyptic number.

212021021323 is a deficient number, since it is larger than the sum of its proper divisors (8653485).

212021021323 is an equidigital number, since it uses as much as digits as its factorization.

212021021323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8653484.

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

Adding to 212021021323 its reverse (323120120212), we get a palindrome (535141141535).

The spelling of 212021021323 in words is "two hundred twelve billion, twenty-one million, twenty-one thousand, three hundred twenty-three".