102201212121 has 8 divisors (see below), whose sum is σ = 138839382720. Its totient is φ = 66848591472.

The previous prime is 102201212117. The next prime is 102201212123. The reversal of 102201212121 is 121212102201.

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

It is not a de Polignac number, because 102201212121 - 2² = 102201212117 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 102201212121.

It is not an unprimeable number, because it can be changed into a prime (102201212123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 321387301 + ... + 321387618.

It is an arithmetic number, because the mean of its divisors is an integer number (17354922840).

Almost surely, 2^102201212121 is an apocalyptic number.

It is an amenable number.

102201212121 is a deficient number, since it is larger than the sum of its proper divisors (36638170599).

102201212121 is an equidigital number, since it uses as much as digits as its factorization.

102201212121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 642774975.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 102201212121 its reverse (121212102201), we get a palindrome (223413314322).

The spelling of 102201212121 in words is "one hundred two billion, two hundred one million, two hundred twelve thousand, one hundred twenty-one".