201221102 has 8 divisors (see below), whose sum is σ = 301898136. Its totient is φ = 100588392.

The previous prime is 201221101. The next prime is 201221113. The reversal of 201221102 is 201122102.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201221101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4853 + ... + 20639.

It is an arithmetic number, because the mean of its divisors is an integer number (37737267).

Almost surely, 2^201221102 is an apocalyptic number.

201221102 is a deficient number, since it is larger than the sum of its proper divisors (100677034).

201221102 is a wasteful number, since it uses less digits than its factorization.

201221102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22162.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 201221102 is about 14185.2424018767. The cubic root of 201221102 is about 585.9913082536.

Adding to 201221102 its reverse (201122102), we get a palindrome (402343204).

The spelling of 201221102 in words is "two hundred one million, two hundred twenty-one thousand, one hundred two".