102120203121 has 8 divisors (see below), whose sum is σ = 137883818880. Its totient is φ = 67218361392.

The previous prime is 102120203111. The next prime is 102120203137. The reversal of 102120203121 is 121302021201.

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

It is not a de Polignac number, because 102120203121 - 2¹³ = 102120194929 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 102120203121.

It is not an unprimeable number, because it can be changed into a prime (102120203111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 215443230 + ... + 215443703.

It is an arithmetic number, because the mean of its divisors is an integer number (17235477360).

Almost surely, 2^102120203121 is an apocalyptic number.

It is an amenable number.

102120203121 is a deficient number, since it is larger than the sum of its proper divisors (35763615759).

102120203121 is an equidigital number, since it uses as much as digits as its factorization.

102120203121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430887015.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 102120203121 its reverse (121302021201), we get a palindrome (223422224322).

The spelling of 102120203121 in words is "one hundred two billion, one hundred twenty million, two hundred three thousand, one hundred twenty-one".