21400302211 has 8 divisors (see below), whose sum is σ = 21869972784. Its totient is φ = 20933072160.

The previous prime is 21400302173. The next prime is 21400302241. The reversal of 21400302211 is 11220300412.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21400302211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21400302241) 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, 592396 + ... + 627481.

It is an arithmetic number, because the mean of its divisors is an integer number (2733746598).

Almost surely, 2^21400302211 is an apocalyptic number.

21400302211 is a deficient number, since it is larger than the sum of its proper divisors (469670573).

21400302211 is a wasteful number, since it uses less digits than its factorization.

21400302211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1220261.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 21400302211 its reverse (11220300412), we get a palindrome (32620602623).

The spelling of 21400302211 in words is "twenty-one billion, four hundred million, three hundred two thousand, two hundred eleven".