21113011145143 has 2 divisors, whose sum is σ = 21113011145144. Its totient is φ = 21113011145142.

The previous prime is 21113011145137. The next prime is 21113011145167. The reversal of 21113011145143 is 34154111031112.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21113011145143 - 2²⁵ = 21112977590711 is a prime.

It is a super-2 number, since 2×21113011145143² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21113011185143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10556505572571 + 10556505572572.

It is an arithmetic number, because the mean of its divisors is an integer number (10556505572572).

Almost surely, 2^{21113011145143} is an apocalyptic number.

21113011145143 is a deficient number, since it is larger than the sum of its proper divisors (1).

21113011145143 is an equidigital number, since it uses as much as digits as its factorization.

21113011145143 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 28.

Adding to 21113011145143 its reverse (34154111031112), we get a palindrome (55267122176255).

The spelling of 21113011145143 in words is "twenty-one trillion, one hundred thirteen billion, eleven million, one hundred forty-five thousand, one hundred forty-three".