221301231131 has 4 divisors (see below), whose sum is σ = 225476726112. Its totient is φ = 217125736152.

The previous prime is 221301231101. The next prime is 221301231163. The reversal of 221301231131 is 131132103122.

It is a happy number.

221301231131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 221301231131 - 2¹⁴ = 221301214747 is a prime.

It is a super-2 number, since 2×221301231131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221301231101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2087747411 + ... + 2087747516.

It is an arithmetic number, because the mean of its divisors is an integer number (56369181528).

Almost surely, 2^221301231131 is an apocalyptic number.

221301231131 is a deficient number, since it is larger than the sum of its proper divisors (4175494981).

221301231131 is an equidigital number, since it uses as much as digits as its factorization.

221301231131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4175494980.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 221301231131 its reverse (131132103122), we get a palindrome (352433334253).

The spelling of 221301231131 in words is "two hundred twenty-one billion, three hundred one million, two hundred thirty-one thousand, one hundred thirty-one".