221210303111231 has 8 divisors (see below), whose sum is σ = 256585085059200. Its totient is φ = 186778848682008.

The previous prime is 221210303111221. The next prime is 221210303111251. The reversal of 221210303111231 is 132111303012122.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221210303111231 is a prime.

It is a super-2 number, since 2×221210303111231² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221210303111197 and 221210303111206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221210303111221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 235831879181 + ... + 235831880118.

It is an arithmetic number, because the mean of its divisors is an integer number (32073135632400).

Almost surely, 2^{221210303111231} is an apocalyptic number.

221210303111231 is a deficient number, since it is larger than the sum of its proper divisors (35374781947969).

221210303111231 is an equidigital number, since it uses as much as digits as its factorization.

221210303111231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 471663759373.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 221210303111231 its reverse (132111303012122), we get a palindrome (353321606123353).

The spelling of 221210303111231 in words is "two hundred twenty-one trillion, two hundred ten billion, three hundred three million, one hundred eleven thousand, two hundred thirty-one".