221201310 has 48 divisors (see below), whose sum is σ = 583542288. Its totient is φ = 53623680.

The previous prime is 221201261. The next prime is 221201329. The reversal of 221201310 is 13102122.

It is a super-2 number, since 2×221201310² = 97860039091432200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26839 + ... + 34098.

It is an arithmetic number, because the mean of its divisors is an integer number (12157131).

Almost surely, 2^221201310 is an apocalyptic number.

221201310 is an abundant number, since it is smaller than the sum of its proper divisors (362340978).

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

221201310 is a wasteful number, since it uses less digits than its factorization.

221201310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60969 (or 60958 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 221201310 is about 14872.8379941422. The cubic root of 221201310 is about 604.7778798932. Note that the first 3 decimals are identical.

Adding to 221201310 its reverse (13102122), we get a palindrome (234303432).

The spelling of 221201310 in words is "two hundred twenty-one million, two hundred one thousand, three hundred ten".