2071611821 has 2 divisors, whose sum is σ = 2071611822. Its totient is φ = 2071611820.

The previous prime is 2071611803. The next prime is 2071611827. The reversal of 2071611821 is 1281161702.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1070205796 + 1001406025 = 32714^2 + 31645^2 .

It is a cyclic number.

It is not a de Polignac number, because 2071611821 - 2¹⁴ = 2071595437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2071611827) 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, 1035805910 + 1035805911.

It is an arithmetic number, because the mean of its divisors is an integer number (1035805911).

Almost surely, 2^2071611821 is an apocalyptic number.

It is an amenable number.

2071611821 is a deficient number, since it is larger than the sum of its proper divisors (1).

2071611821 is an equidigital number, since it uses as much as digits as its factorization.

2071611821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344, while the sum is 29.

The square root of 2071611821 is about 45514.9626057190. The cubic root of 2071611821 is about 1274.7825995601.

The spelling of 2071611821 in words is "two billion, seventy-one million, six hundred eleven thousand, eight hundred twenty-one".