2121023171 has 2 divisors, whose sum is σ = 2121023172. Its totient is φ = 2121023170.

The previous prime is 2121023167. The next prime is 2121023213. The reversal of 2121023171 is 1713201212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2121023171 - 2² = 2121023167 is a prime.

It is not a weakly prime, because it can be changed into another prime (2121023771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060511585 + 1060511586.

It is an arithmetic number, because the mean of its divisors is an integer number (1060511586).

Almost surely, 2^2121023171 is an apocalyptic number.

2121023171 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121023171 is an equidigital number, since it uses as much as digits as its factorization.

2121023171 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 168, while the sum is 20.

The square root of 2121023171 is about 46054.5673196481. The cubic root of 2121023171 is about 1284.8382908036.

Adding to 2121023171 its reverse (1713201212), we get a palindrome (3834224383).

The spelling of 2121023171 in words is "two billion, one hundred twenty-one million, twenty-three thousand, one hundred seventy-one".