21201000223 has 64 divisors (see below), whose sum is σ = 25372569600. Its totient is φ = 17540167680.

The previous prime is 21201000221. The next prime is 21201000251. The reversal of 21201000223 is 32200010212.

It is not a de Polignac number, because 21201000223 - 2¹ = 21201000221 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21201000221) 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 63 ways as a sum of consecutive naturals, for example, 92580673 + ... + 92580901.

It is an arithmetic number, because the mean of its divisors is an integer number (396446400).

Almost surely, 2^21201000223 is an apocalyptic number.

21201000223 is a deficient number, since it is larger than the sum of its proper divisors (4171569377).

21201000223 is a wasteful number, since it uses less digits than its factorization.

21201000223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 512.

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 21201000223 its reverse (32200010212), we get a palindrome (53401010435).

The spelling of 21201000223 in words is "twenty-one billion, two hundred one million, two hundred twenty-three", and thus it is an aban number.