221323210101 has 12 divisors (see below), whose sum is σ = 365358950112. Its totient is φ = 126470405736.

The previous prime is 221323210037. The next prime is 221323210117. The reversal of 221323210101 is 101012323122.

221323210101 is a `hidden beast` number, since 221 + 323 + 21 + 0 + 101 = 666.

It is not a de Polignac number, because 221323210101 - 2⁶ = 221323210037 is a prime.

It is a super-2 number, since 2×221323210101² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221323210151) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1756533351 + ... + 1756533476.

It is an arithmetic number, because the mean of its divisors is an integer number (30446579176).

Almost surely, 2^221323210101 is an apocalyptic number.

221323210101 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

221323210101 is a deficient number, since it is larger than the sum of its proper divisors (144035740011).

221323210101 is a wasteful number, since it uses less digits than its factorization.

221323210101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3513066840 (or 3513066837 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 221323210101 its reverse (101012323122), we get a palindrome (322335533223).

The spelling of 221323210101 in words is "two hundred twenty-one billion, three hundred twenty-three million, two hundred ten thousand, one hundred one".