2100119981 has 2 divisors, whose sum is σ = 2100119982. Its totient is φ = 2100119980.

The previous prime is 2100119977. The next prime is 2100120019. The reversal of 2100119981 is 1899110012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2094526756 + 5593225 = 45766^2 + 2365^2 .

It is a cyclic number.

It is not a de Polignac number, because 2100119981 - 2² = 2100119977 is a prime.

It is a super-2 number, since 2×2100119981² = 8821007869190880722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2100119881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050059990 + 1050059991.

It is an arithmetic number, because the mean of its divisors is an integer number (1050059991).

Almost surely, 2^2100119981 is an apocalyptic number.

It is an amenable number.

2100119981 is a deficient number, since it is larger than the sum of its proper divisors (1).

2100119981 is an equidigital number, since it uses as much as digits as its factorization.

2100119981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 32.

The square root of 2100119981 is about 45827.0660308949. The cubic root of 2100119981 is about 1280.6035526451.

Adding to 2100119981 its reverse (1899110012), we get a palindrome (3999229993).

The spelling of 2100119981 in words is "two billion, one hundred million, one hundred nineteen thousand, nine hundred eighty-one".