21110075254 has 4 divisors (see below), whose sum is σ = 31665112884. Its totient is φ = 10555037626.

The previous prime is 21110075251. The next prime is 21110075293. The reversal of 21110075254 is 45257001112.

21110075254 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21110075251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5277518812 + ... + 5277518815.

It is an arithmetic number, because the mean of its divisors is an integer number (7916278221).

Almost surely, 2^21110075254 is an apocalyptic number.

21110075254 is a deficient number, since it is larger than the sum of its proper divisors (10555037630).

21110075254 is a wasteful number, since it uses less digits than its factorization.

21110075254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10555037629.

The product of its (nonzero) digits is 2800, while the sum is 28.

Adding to 21110075254 its reverse (45257001112), we get a palindrome (66367076366).

The spelling of 21110075254 in words is "twenty-one billion, one hundred ten million, seventy-five thousand, two hundred fifty-four".