201221102102 has 8 divisors (see below), whose sum is σ = 308850994056. Its totient is φ = 98270770752.

The previous prime is 201221102081. The next prime is 201221102171. The reversal of 201221102102 is 201201122102.

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

It is a super-2 number, since 2×201221102102² (a number of 23 digits) 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 3 ways as a sum of consecutive naturals, for example, 1169890043 + ... + 1169890214.

It is an arithmetic number, because the mean of its divisors is an integer number (38606374257).

Almost surely, 2^201221102102 is an apocalyptic number.

201221102102 is a deficient number, since it is larger than the sum of its proper divisors (107629891954).

201221102102 is a wasteful number, since it uses less digits than its factorization.

201221102102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2339780302.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 201221102102 its reverse (201201122102), we get a palindrome (402422224204).

The spelling of 201221102102 in words is "two hundred one billion, two hundred twenty-one million, one hundred two thousand, one hundred two".