21255410131054 has 32 divisors (see below), whose sum is σ = 34938613011456. Its totient is φ = 9617932475520.

The previous prime is 21255410131027. The next prime is 21255410131091. The reversal of 21255410131054 is 45013101455212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 322669029 + ... + 322734895.

It is an arithmetic number, because the mean of its divisors is an integer number (1091831656608).

Almost surely, 2^{21255410131054} is an apocalyptic number.

21255410131054 is a deficient number, since it is larger than the sum of its proper divisors (13683202880402).

21255410131054 is a wasteful number, since it uses less digits than its factorization.

21255410131054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131880.

The product of its (nonzero) digits is 24000, while the sum is 34.

Adding to 21255410131054 its reverse (45013101455212), we get a palindrome (66268511586266).

The spelling of 21255410131054 in words is "twenty-one trillion, two hundred fifty-five billion, four hundred ten million, one hundred thirty-one thousand, fifty-four".