102120210121 has 8 divisors (see below), whose sum is σ = 103856084640. Its totient is φ = 100384503168.

The previous prime is 102120210113. The next prime is 102120210133. The reversal of 102120210121 is 121012021201.

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

It is a cyclic number.

It is not a de Polignac number, because 102120210121 - 2³ = 102120210113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102120210221) 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, 2172550 + ... + 2219056.

It is an arithmetic number, because the mean of its divisors is an integer number (12982010580).

Almost surely, 2^102120210121 is an apocalyptic number.

It is an amenable number.

102120210121 is a deficient number, since it is larger than the sum of its proper divisors (1735874519).

102120210121 is an equidigital number, since it uses as much as digits as its factorization.

102120210121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83783.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 102120210121 its reverse (121012021201), we get a palindrome (223132231322).

The spelling of 102120210121 in words is "one hundred two billion, one hundred twenty million, two hundred ten thousand, one hundred twenty-one".