221235102 has 24 divisors (see below), whose sum is σ = 522919800. Its totient is φ = 67040880.

The previous prime is 221235097. The next prime is 221235103. The reversal of 221235102 is 201532122.

221235102 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 (221235103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 558477 + ... + 558872.

It is an arithmetic number, because the mean of its divisors is an integer number (21788325).

Almost surely, 2^221235102 is an apocalyptic number.

221235102 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

221235102 is an abundant number, since it is smaller than the sum of its proper divisors (301684698).

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

221235102 is a wasteful number, since it uses less digits than its factorization.

221235102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1117368 (or 1117365 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 221235102 is about 14873.9739814214. The cubic root of 221235102 is about 604.8086747884.

Adding to 221235102 its reverse (201532122), we get a palindrome (422767224).

It can be divided in two parts, 22123 and 5102, that added together give a square (27225 = 165²).

The spelling of 221235102 in words is "two hundred twenty-one million, two hundred thirty-five thousand, one hundred two".