21134343411 has 24 divisors (see below), whose sum is σ = 30692678016. Its totient is φ = 14013423360.

The previous prime is 21134343409. The next prime is 21134343421. The reversal of 21134343411 is 11434343112.

21134343411 is a `hidden beast` number, since 211 + 3 + 4 + 3 + 434 + 11 = 666.

It is not a de Polignac number, because 21134343411 - 2¹ = 21134343409 is a prime.

It is a super-2 number, since 2×21134343411² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21134343421) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1844446 + ... + 1855868.

It is an arithmetic number, because the mean of its divisors is an integer number (1278861584).

Almost surely, 2^21134343411 is an apocalyptic number.

21134343411 is a deficient number, since it is larger than the sum of its proper divisors (9558334605).

21134343411 is a wasteful number, since it uses less digits than its factorization.

21134343411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12523 (or 12520 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

Adding to 21134343411 its reverse (11434343112), we get a palindrome (32568686523).

The spelling of 21134343411 in words is "twenty-one billion, one hundred thirty-four million, three hundred forty-three thousand, four hundred eleven".