2100131209979 has 4 divisors (see below), whose sum is σ = 2291052229080. Its totient is φ = 1909210190880.

The previous prime is 2100131209933. The next prime is 2100131210033. The reversal of 2100131209979 is 9799021310012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2100131209979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2100131209679) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95460509534 + ... + 95460509555.

It is an arithmetic number, because the mean of its divisors is an integer number (572763057270).

Almost surely, 2^{2100131209979} is an apocalyptic number.

2100131209979 is a deficient number, since it is larger than the sum of its proper divisors (190921019101).

2100131209979 is a wasteful number, since it uses less digits than its factorization.

2100131209979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190921019100.

The product of its (nonzero) digits is 61236, while the sum is 44.

The spelling of 2100131209979 in words is "two trillion, one hundred billion, one hundred thirty-one million, two hundred nine thousand, nine hundred seventy-nine".