21442307211 has 48 divisors (see below), whose sum is σ = 33653620000. Its totient is φ = 13077490176.

The previous prime is 21442307209. The next prime is 21442307231. The reversal of 21442307211 is 11270324412.

21442307211 is a `hidden beast` number, since 2 + 1 + 442 + 3 + 0 + 7 + 211 = 666.

It is not a de Polignac number, because 21442307211 - 2¹ = 21442307209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21442307231) 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 47 ways as a sum of consecutive naturals, for example, 7798665 + ... + 7801413.

Almost surely, 2^21442307211 is an apocalyptic number.

21442307211 is a deficient number, since it is larger than the sum of its proper divisors (12211312789).

21442307211 is a wasteful number, since it uses less digits than its factorization.

21442307211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3340 (or 3337 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The spelling of 21442307211 in words is "twenty-one billion, four hundred forty-two million, three hundred seven thousand, two hundred eleven".