210021013223 has 32 divisors (see below), whose sum is σ = 255718425600. Its totient is φ = 172092006240.

The previous prime is 210021013219. The next prime is 210021013243. The reversal of 210021013223 is 322310120012.

It is not a de Polignac number, because 210021013223 - 2² = 210021013219 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 (210021013243) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15747668 + ... + 15760998.

It is an arithmetic number, because the mean of its divisors is an integer number (7991200800).

Almost surely, 2^210021013223 is an apocalyptic number.

210021013223 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

210021013223 is a deficient number, since it is larger than the sum of its proper divisors (45697412377).

210021013223 is a wasteful number, since it uses less digits than its factorization.

210021013223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15372 (or 15358 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 210021013223 its reverse (322310120012), we get a palindrome (532331133235).

The spelling of 210021013223 in words is "two hundred ten billion, twenty-one million, thirteen thousand, two hundred twenty-three".