2101639041 has 20 divisors (see below), whose sum is σ = 3140978500. Its totient is φ = 1400426496.

The previous prime is 2101639031. The next prime is 2101639069. The reversal of 2101639041 is 1409361012.

2101639041 is a `hidden beast` number, since 21 + 0 + 1 + 639 + 0 + 4 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 140920641 + 1960718400 = 11871^2 + 44280^2 .

It is not a de Polignac number, because 2101639041 - 2⁶ = 2101638977 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2101638996 and 2101639014.

It is not an unprimeable number, because it can be changed into a prime (2101639021) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 212985 + ... + 222633.

It is an arithmetic number, because the mean of its divisors is an integer number (157048925).

Almost surely, 2^2101639041 is an apocalyptic number.

It is an amenable number.

2101639041 is a deficient number, since it is larger than the sum of its proper divisors (1039339459).

2101639041 is an equidigital number, since it uses as much as digits as its factorization.

2101639041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12350 (or 12341 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 2101639041 is about 45843.6368648911. The cubic root of 2101639041 is about 1280.9122405312.

The spelling of 2101639041 in words is "two billion, one hundred one million, six hundred thirty-nine thousand, forty-one".