221131214311 has 4 divisors (see below), whose sum is σ = 252721387792. Its totient is φ = 189541040832.

The previous prime is 221131214309. The next prime is 221131214321. The reversal of 221131214311 is 113412131122.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 113412131122 = 2 ⋅56706065561.

It is a cyclic number.

It is not a de Polignac number, because 221131214311 - 2¹ = 221131214309 is a prime.

It is a super-2 number, since 2×221131214311² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221131214321) 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 3 ways as a sum of consecutive naturals, for example, 15795086730 + ... + 15795086743.

It is an arithmetic number, because the mean of its divisors is an integer number (63180346948).

Almost surely, 2^221131214311 is an apocalyptic number.

221131214311 is a deficient number, since it is larger than the sum of its proper divisors (31590173481).

221131214311 is an equidigital number, since it uses as much as digits as its factorization.

221131214311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31590173480.

The product of its digits is 288, while the sum is 22.

Adding to 221131214311 its reverse (113412131122), we get a palindrome (334543345433).

The spelling of 221131214311 in words is "two hundred twenty-one billion, one hundred thirty-one million, two hundred fourteen thousand, three hundred eleven".