221131003231 has 4 divisors (see below), whose sum is σ = 221341806000. Its totient is φ = 220920200464.

The previous prime is 221131003213. The next prime is 221131003277. The reversal of 221131003231 is 132300131122.

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 221131003231 - 2¹¹ = 221131001183 is a prime.

It is a super-2 number, since 2×221131003231² (a number of 23 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 = 221131003199 and 221131003208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221131003631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105399811 + ... + 105401908.

It is an arithmetic number, because the mean of its divisors is an integer number (55335451500).

Almost surely, 2^221131003231 is an apocalyptic number.

221131003231 is a deficient number, since it is larger than the sum of its proper divisors (210802769).

221131003231 is a wasteful number, since it uses less digits than its factorization.

221131003231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210802768.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 221131003231 its reverse (132300131122), we get a palindrome (353431134353).

The spelling of 221131003231 in words is "two hundred twenty-one billion, one hundred thirty-one million, three thousand, two hundred thirty-one".