102001121 has 2 divisors, whose sum is σ = 102001122. Its totient is φ = 102001120.

The previous prime is 102001099. The next prime is 102001127. The reversal of 102001121 is 121100201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 97318225 + 4682896 = 9865^2 + 2164^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102001121 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 102001099 and 102001108.

It is not a weakly prime, because it can be changed into another prime (102001127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51000560 + 51000561.

It is an arithmetic number, because the mean of its divisors is an integer number (51000561).

Almost surely, 2^102001121 is an apocalyptic number.

It is an amenable number.

102001121 is a deficient number, since it is larger than the sum of its proper divisors (1).

102001121 is an equidigital number, since it uses as much as digits as its factorization.

102001121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 102001121 is about 10099.5604359794. The cubic root of 102001121 is about 467.2345844896.

Adding to 102001121 its reverse (121100201), we get a palindrome (223101322).

The spelling of 102001121 in words is "one hundred two million, one thousand, one hundred twenty-one".