21541132611 has 12 divisors (see below), whose sum is σ = 31123729000. Its totient is φ = 14356712160.

The previous prime is 21541132583. The next prime is 21541132643. The reversal of 21541132611 is 11623114512.

21541132611 is a `hidden beast` number, since 2 + 1 + 5 + 4 + 11 + 32 + 611 = 666.

It is not a de Polignac number, because 21541132611 - 2⁵ = 21541132579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21541132651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 302986 + ... + 367263.

Almost surely, 2^21541132611 is an apocalyptic number.

21541132611 is a deficient number, since it is larger than the sum of its proper divisors (9582596389).

21541132611 is a wasteful number, since it uses less digits than its factorization.

21541132611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 673826 (or 673823 counting only the distinct ones).

The product of its digits is 1440, while the sum is 27.

The spelling of 21541132611 in words is "twenty-one billion, five hundred forty-one million, one hundred thirty-two thousand, six hundred eleven".