2101101979 has 2 divisors, whose sum is σ = 2101101980. Its totient is φ = 2101101978.

The previous prime is 2101101967. The next prime is 2101102013. The reversal of 2101101979 is 9791011012.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2101101979 - 2⁹ = 2101101467 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2101101979.

It is not a weakly prime, because it can be changed into another prime (2101101929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050550989 + 1050550990.

It is an arithmetic number, because the mean of its divisors is an integer number (1050550990).

Almost surely, 2^2101101979 is an apocalyptic number.

2101101979 is a deficient number, since it is larger than the sum of its proper divisors (1).

2101101979 is an equidigital number, since it uses as much as digits as its factorization.

2101101979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1134, while the sum is 31.

The square root of 2101101979 is about 45837.7789492467. The cubic root of 2101101979 is about 1280.8031212702.

The spelling of 2101101979 in words is "two billion, one hundred one million, one hundred one thousand, nine hundred seventy-nine".