221210011231 has 24 divisors (see below), whose sum is σ = 249015108384. Its totient is φ = 196303800000.

The previous prime is 221210011229. The next prime is 221210011237. The reversal of 221210011231 is 132110012122.

221210011231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 221210011231 - 2¹ = 221210011229 is a prime.

It is a super-2 number, since 2×221210011231² (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 (221210011237) 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 23 ways as a sum of consecutive naturals, for example, 740221 + ... + 995161.

It is an arithmetic number, because the mean of its divisors is an integer number (10375629516).

Almost surely, 2^221210011231 is an apocalyptic number.

221210011231 is a deficient number, since it is larger than the sum of its proper divisors (27805097153).

221210011231 is a wasteful number, since it uses less digits than its factorization.

221210011231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255135 (or 255124 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 221210011231 its reverse (132110012122), we get a palindrome (353320023353).

The spelling of 221210011231 in words is "two hundred twenty-one billion, two hundred ten million, eleven thousand, two hundred thirty-one".