21400004211 has 16 divisors (see below), whose sum is σ = 28785002400. Its totient is φ = 14141378048.

The previous prime is 21400004207. The next prime is 21400004221. The reversal of 21400004211 is 11240000412.

It is a cyclic number.

It is not a de Polignac number, because 21400004211 - 2² = 21400004207 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21400004221) 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 15 ways as a sum of consecutive naturals, for example, 91675 + ... + 226283.

It is an arithmetic number, because the mean of its divisors is an integer number (1799062650).

Almost surely, 2^21400004211 is an apocalyptic number.

21400004211 is a deficient number, since it is larger than the sum of its proper divisors (7384998189).

21400004211 is a wasteful number, since it uses less digits than its factorization.

21400004211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135078.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 21400004211 its reverse (11240000412), we get a palindrome (32640004623).

The spelling of 21400004211 in words is "twenty-one billion, four hundred million, four thousand, two hundred eleven".