21221110133223 has 128 divisors (see below), whose sum is σ = 39308671180800. Its totient is φ = 9822955968000.

The previous prime is 21221110133131. The next prime is 21221110133239. The reversal of 21221110133223 is 32233101112212.

It is not a de Polignac number, because 21221110133223 - 2⁸ = 21221110132967 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21221110133193 and 21221110133202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21221110153223) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 451000048 + ... + 451047098.

It is an arithmetic number, because the mean of its divisors is an integer number (307098993600).

Almost surely, 2^{21221110133223} is an apocalyptic number.

21221110133223 is a deficient number, since it is larger than the sum of its proper divisors (18087561047577).

21221110133223 is a wasteful number, since it uses less digits than its factorization.

21221110133223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52293.

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 21221110133223 its reverse (32233101112212), we get a palindrome (53454211245435).

The spelling of 21221110133223 in words is "twenty-one trillion, two hundred twenty-one billion, one hundred ten million, one hundred thirty-three thousand, two hundred twenty-three".