221310102 has 16 divisors (see below), whose sum is σ = 476668080. Its totient is φ = 68095392.

The previous prime is 221310091. The next prime is 221310109. The reversal of 221310102 is 201013122.

221310102 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×221310102² = 97956322494500808, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221310109) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1418577 + ... + 1418732.

It is an arithmetic number, because the mean of its divisors is an integer number (29791755).

Almost surely, 2^221310102 is an apocalyptic number.

221310102 is an abundant number, since it is smaller than the sum of its proper divisors (255357978).

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

221310102 is a wasteful number, since it uses less digits than its factorization.

221310102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2837327.

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

The square root of 221310102 is about 14876.4949500882. The cubic root of 221310102 is about 604.8770116321.

Adding to 221310102 its reverse (201013122), we get a palindrome (422323224).

The spelling of 221310102 in words is "two hundred twenty-one million, three hundred ten thousand, one hundred two".