21434333211 has 16 divisors (see below), whose sum is σ = 32612800800. Its totient is φ = 13903350624.

The previous prime is 21434333209. The next prime is 21434333237. The reversal of 21434333211 is 11233343412.

It is a happy number.

21434333211 is a `hidden beast` number, since 2 + 14 + 3 + 433 + 3 + 211 = 666.

It is not a de Polignac number, because 21434333211 - 2¹ = 21434333209 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (21434333201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10726896 + ... + 10728893.

It is an arithmetic number, because the mean of its divisors is an integer number (2038300050).

Almost surely, 2^21434333211 is an apocalyptic number.

21434333211 is a deficient number, since it is larger than the sum of its proper divisors (11178467589).

21434333211 is a wasteful number, since it uses less digits than its factorization.

21434333211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21455835 (or 21455829 counting only the distinct ones).

The product of its digits is 5184, while the sum is 27.

Adding to 21434333211 its reverse (11233343412), we get a palindrome (32667676623).

The spelling of 21434333211 in words is "twenty-one billion, four hundred thirty-four million, three hundred thirty-three thousand, two hundred eleven".