102001120121 has 4 divisors (see below), whose sum is σ = 102005088372. Its totient is φ = 101997151872.

The previous prime is 102001120093. The next prime is 102001120129. The reversal of 102001120121 is 121021100201.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 47989036096 + 54012084025 = 219064^2 + 232405^2 .

It is a cyclic number.

It is not a de Polignac number, because 102001120121 - 2¹⁰ = 102001119097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102001120129) 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, 1945316 + ... + 1997061.

It is an arithmetic number, because the mean of its divisors is an integer number (25501272093).

Almost surely, 2^102001120121 is an apocalyptic number.

It is an amenable number.

102001120121 is a deficient number, since it is larger than the sum of its proper divisors (3968251).

102001120121 is an equidigital number, since it uses as much as digits as its factorization.

102001120121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3968250.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 102001120121 its reverse (121021100201), we get a palindrome (223022220322).

The spelling of 102001120121 in words is "one hundred two billion, one million, one hundred twenty thousand, one hundred twenty-one".