2100779911 has 16 divisors (see below), whose sum is σ = 2230663104. Its totient is φ = 1974322944.

The previous prime is 2100779909. The next prime is 2100779927. The reversal of 2100779911 is 1199770012.

It is not a de Polignac number, because 2100779911 - 2¹ = 2100779909 is a prime.

It is a super-2 number, since 2×2100779911² = 8826552468922335842, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100779971) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 462825 + ... + 467341.

It is an arithmetic number, because the mean of its divisors is an integer number (139416444).

Almost surely, 2^2100779911 is an apocalyptic number.

2100779911 is a deficient number, since it is larger than the sum of its proper divisors (129883193).

2100779911 is a wasteful number, since it uses less digits than its factorization.

2100779911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4890.

The product of its (nonzero) digits is 7938, while the sum is 37.

The square root of 2100779911 is about 45834.2656862745. The cubic root of 2100779911 is about 1280.7376751722.

The spelling of 2100779911 in words is "two billion, one hundred million, seven hundred seventy-nine thousand, nine hundred eleven".