221230211310 has 32 divisors (see below), whose sum is σ = 589947230880. Its totient is φ = 58994722944.

The previous prime is 221230211281. The next prime is 221230211311. The reversal of 221230211310 is 13112032122.

221230211310 is a `hidden beast` number, since 22 + 123 + 0 + 211 + 310 = 666.

It is a super-2 number, since 2×221230211310² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221230211311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 409685307 + ... + 409685846.

It is an arithmetic number, because the mean of its divisors is an integer number (18435850965).

Almost surely, 2^221230211310 is an apocalyptic number.

221230211310 is an abundant number, since it is smaller than the sum of its proper divisors (368717019570).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221230211310 is a wasteful number, since it uses less digits than its factorization.

221230211310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 819371169 (or 819371163 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 221230211310 its reverse (13112032122), we get a palindrome (234342243432).

The spelling of 221230211310 in words is "two hundred twenty-one billion, two hundred thirty million, two hundred eleven thousand, three hundred ten".