212021011223 has 8 divisors (see below), whose sum is σ = 242315601792. Its totient is φ = 181727889336.

The previous prime is 212021011177. The next prime is 212021011259. The reversal of 212021011223 is 322110120212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 212021011223 - 2¹² = 212021007127 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212021011273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38165 + ... + 652302.

It is an arithmetic number, because the mean of its divisors is an integer number (30289450224).

Almost surely, 2^212021011223 is an apocalyptic number.

212021011223 is a deficient number, since it is larger than the sum of its proper divisors (30294590569).

212021011223 is an equidigital number, since it uses as much as digits as its factorization.

212021011223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 734341.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 212021011223 its reverse (322110120212), we get a palindrome (534131131435).

The spelling of 212021011223 in words is "two hundred twelve billion, twenty-one million, eleven thousand, two hundred twenty-three".