21155143041426 has 16 divisors (see below), whose sum is σ = 42698453846400. Its totient is φ = 6987019719888.

The previous prime is 21155143041397. The next prime is 21155143041443. The reversal of 21155143041426 is 62414034155112.

It is a super-2 number, since 2×21155143041426² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 16173656106 + ... + 16173657413.

It is an arithmetic number, because the mean of its divisors is an integer number (2668653365400).

Almost surely, 2^{21155143041426} is an apocalyptic number.

21155143041426 is an abundant number, since it is smaller than the sum of its proper divisors (21543310804974).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21155143041426 is a wasteful number, since it uses less digits than its factorization.

21155143041426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32347313633.

The product of its (nonzero) digits is 115200, while the sum is 39.

Adding to 21155143041426 its reverse (62414034155112), we get a palindrome (83569177196538).

The spelling of 21155143041426 in words is "twenty-one trillion, one hundred fifty-five billion, one hundred forty-three million, forty-one thousand, four hundred twenty-six".