2120771 has 2 divisors, whose sum is σ = 2120772. Its totient is φ = 2120770.

The previous prime is 2120753. The next prime is 2120779. The reversal of 2120771 is 1770212.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2120771 is a prime.

It is a Chen prime.

It is a pancake number, because a pancake can be divided into 2120771 parts by 2059 straight cuts.

It is not a weakly prime, because it can be changed into another prime (2120779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060385 + 1060386.

It is an arithmetic number, because the mean of its divisors is an integer number (1060386).

2^2120771 is an apocalyptic number.

2120771 is a deficient number, since it is larger than the sum of its proper divisors (1).

2120771 is an equidigital number, since it uses as much as digits as its factorization.

2120771 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 196, while the sum is 20.

The square root of 2120771 is about 1456.2867162753. The cubic root of 2120771 is about 128.4787370128.

Adding to 2120771 its reverse (1770212), we get a palindrome (3890983).

The spelling of 2120771 in words is "two million, one hundred twenty thousand, seven hundred seventy-one".