2116019921 has 2 divisors, whose sum is σ = 2116019922. Its totient is φ = 2116019920.

The previous prime is 2116019861. The next prime is 2116019957. The reversal of 2116019921 is 1299106112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2112689296 + 3330625 = 45964^2 + 1825^2 .

It is a cyclic number.

It is not a de Polignac number, because 2116019921 - 2¹⁴ = 2116003537 is a prime.

It is not a weakly prime, because it can be changed into another prime (2116019221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1058009960 + 1058009961.

It is an arithmetic number, because the mean of its divisors is an integer number (1058009961).

Almost surely, 2^2116019921 is an apocalyptic number.

It is an amenable number.

2116019921 is a deficient number, since it is larger than the sum of its proper divisors (1).

2116019921 is an equidigital number, since it uses as much as digits as its factorization.

2116019921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 32.

The square root of 2116019921 is about 46000.2165320991. The cubic root of 2116019921 is about 1283.8272334212.

The spelling of 2116019921 in words is "two billion, one hundred sixteen million, nineteen thousand, nine hundred twenty-one".