21255324143044 has 12 divisors (see below), whose sum is σ = 37229134215168. Its totient is φ = 10618428653000.

The previous prime is 21255324143023. The next prime is 21255324143059. The reversal of 21255324143044 is 44034142355212.

It is a junction number, because it is equal to n+sod(n) for n = 21255324142988 and 21255324143006.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2308349452 + ... + 2308358659.

It is an arithmetic number, because the mean of its divisors is an integer number (3102427851264).

Almost surely, 2^{21255324143044} is an apocalyptic number.

It is an amenable number.

21255324143044 is a deficient number, since it is larger than the sum of its proper divisors (15973810072124).

21255324143044 is a wasteful number, since it uses less digits than its factorization.

21255324143044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4616709266 (or 4616709264 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 40.

Adding to 21255324143044 its reverse (44034142355212), we get a palindrome (65289466498256).

The spelling of 21255324143044 in words is "twenty-one trillion, two hundred fifty-five billion, three hundred twenty-four million, one hundred forty-three thousand, forty-four".