2111704621 has 8 divisors (see below), whose sum is σ = 2276748824. Its totient is φ = 1947032640.

The previous prime is 2111704613. The next prime is 2111704723. The reversal of 2111704621 is 1264071112.

It can be written as a sum of positive squares in 4 ways, for example, as 504496521 + 1607208100 = 22461^2 + 40090^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2111704621 - 2³ = 2111704613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111704601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81210 + ... + 104011.

It is an arithmetic number, because the mean of its divisors is an integer number (284593603).

Almost surely, 2^2111704621 is an apocalyptic number.

It is an amenable number.

2111704621 is a deficient number, since it is larger than the sum of its proper divisors (165044203).

2111704621 is a wasteful number, since it uses less digits than its factorization.

2111704621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186111.

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 2111704621 is about 45953.2873796859. The cubic root of 2111704621 is about 1282.9539161868.

Adding to 2111704621 its reverse (1264071112), we get a palindrome (3375775733).

The spelling of 2111704621 in words is "two billion, one hundred eleven million, seven hundred four thousand, six hundred twenty-one".