2119388081 has 2 divisors, whose sum is σ = 2119388082. Its totient is φ = 2119388080.

The previous prime is 2119388077. The next prime is 2119388093. The reversal of 2119388081 is 1808839112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2116828081 + 2560000 = 46009^2 + 1600^2 .

It is a cyclic number.

It is not a de Polignac number, because 2119388081 - 2² = 2119388077 is a prime.

It is a super-2 number, since 2×2119388081² = 8983611675769725122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2119388681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1059694040 + 1059694041.

It is an arithmetic number, because the mean of its divisors is an integer number (1059694041).

Almost surely, 2^2119388081 is an apocalyptic number.

It is an amenable number.

2119388081 is a deficient number, since it is larger than the sum of its proper divisors (1).

2119388081 is an equidigital number, since it uses as much as digits as its factorization.

2119388081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27648, while the sum is 41.

The square root of 2119388081 is about 46036.8122375996. The cubic root of 2119388081 is about 1284.5080466804.

The spelling of 2119388081 in words is "two billion, one hundred nineteen million, three hundred eighty-eight thousand, eighty-one".