21606601101 has 16 divisors (see below), whose sum is σ = 29211818496. Its totient is φ = 14203005696.

The previous prime is 21606601063. The next prime is 21606601103. The reversal of 21606601101 is 10110660612.

It is not a de Polignac number, because 21606601101 - 2¹⁴ = 21606584717 is a prime.

It is a super-2 number, since 2×21606601101² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21606601103) 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 15 ways as a sum of consecutive naturals, for example, 879876 + ... + 904098.

It is an arithmetic number, because the mean of its divisors is an integer number (1825738656).

Almost surely, 2^21606601101 is an apocalyptic number.

It is an amenable number.

21606601101 is a deficient number, since it is larger than the sum of its proper divisors (7605217395).

21606601101 is a wasteful number, since it uses less digits than its factorization.

21606601101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28372.

The product of its (nonzero) digits is 432, while the sum is 24.

The spelling of 21606601101 in words is "twenty-one billion, six hundred six million, six hundred one thousand, one hundred one".