21143400443011 has 32 divisors (see below), whose sum is σ = 27583698087936. Its totient is φ = 15725503296000.

The previous prime is 21143400443003. The next prime is 21143400443041. The reversal of 21143400443011 is 11034400434112.

It is a cyclic number.

It is not a de Polignac number, because 21143400443011 - 2³ = 21143400443003 is a prime.

It is a super-2 number, since 2×21143400443011² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21143400443041) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 60495130 + ... + 60843631.

It is an arithmetic number, because the mean of its divisors is an integer number (861990565248).

Almost surely, 2^{21143400443011} is an apocalyptic number.

21143400443011 is a deficient number, since it is larger than the sum of its proper divisors (6440297644925).

21143400443011 is a wasteful number, since it uses less digits than its factorization.

21143400443011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121338883.

The product of its (nonzero) digits is 4608, while the sum is 28.

Adding to 21143400443011 its reverse (11034400434112), we get a palindrome (32177800877123).

The spelling of 21143400443011 in words is "twenty-one trillion, one hundred forty-three billion, four hundred million, four hundred forty-three thousand, eleven".