21043142004255 has 32 divisors (see below), whose sum is σ = 38505370888704. Its totient is φ = 9613101396096.

The previous prime is 21043142004239. The next prime is 21043142004299. The reversal of 21043142004255 is 55240024134012.

It is not a de Polignac number, because 21043142004255 - 2⁴ = 21043142004239 is a prime.

It is a super-2 number, since 2×21043142004255² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 68811949 + ... + 69117078.

It is an arithmetic number, because the mean of its divisors is an integer number (1203292840272).

Almost surely, 2^{21043142004255} is an apocalyptic number.

21043142004255 is a deficient number, since it is larger than the sum of its proper divisors (17462228884449).

21043142004255 is a wasteful number, since it uses less digits than its factorization.

21043142004255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137930495.

The product of its (nonzero) digits is 38400, while the sum is 33.

Adding to 21043142004255 its reverse (55240024134012), we get a palindrome (76283166138267).

The spelling of 21043142004255 in words is "twenty-one trillion, forty-three billion, one hundred forty-two million, four thousand, two hundred fifty-five".