2120101 has 2 divisors, whose sum is σ = 2120102. Its totient is φ = 2120100.

The previous prime is 2120099. The next prime is 2120113. The reversal of 2120101 is 1010212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1623076 + 497025 = 1274^2 + 705^2 .

It is a cyclic number.

It is not a de Polignac number, because 2120101 - 2¹ = 2120099 is a prime.

Together with 2120099, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2120171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060050 + 1060051.

It is an arithmetic number, because the mean of its divisors is an integer number (1060051).

2^2120101 is an apocalyptic number.

It is an amenable number.

2120101 is a deficient number, since it is larger than the sum of its proper divisors (1).

2120101 is an equidigital number, since it uses as much as digits as its factorization.

2120101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4, while the sum is 7.

The square root of 2120101 is about 1456.0566609854. The cubic root of 2120101 is about 128.4652057986.

Adding to 2120101 its reverse (1010212), we get a palindrome (3130313).

The spelling of 2120101 in words is "two million, one hundred twenty thousand, one hundred one".