2120009971 has 2 divisors, whose sum is σ = 2120009972. Its totient is φ = 2120009970.

The previous prime is 2120009891. The next prime is 2120010023. The reversal of 2120009971 is 1799000212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2120009971 - 2¹⁷ = 2119878899 is a prime.

It is not a weakly prime, because it can be changed into another prime (2120003971) 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, 1060004985 + 1060004986.

It is an arithmetic number, because the mean of its divisors is an integer number (1060004986).

Almost surely, 2^2120009971 is an apocalyptic number.

2120009971 is a deficient number, since it is larger than the sum of its proper divisors (1).

2120009971 is an equidigital number, since it uses as much as digits as its factorization.

2120009971 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2268, while the sum is 31.

The square root of 2120009971 is about 46043.5660108989. The cubic root of 2120009971 is about 1284.6336717128.

The spelling of 2120009971 in words is "two billion, one hundred twenty million, nine thousand, nine hundred seventy-one".