21455105111522 has 16 divisors (see below), whose sum is σ = 32495347789632. Its totient is φ = 10623324035280.

The previous prime is 21455105111507. The next prime is 21455105111599. The reversal of 21455105111522 is 22511150155412.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36657197 + ... + 37237887.

It is an arithmetic number, because the mean of its divisors is an integer number (2030959236852).

Almost surely, 2^{21455105111522} is an apocalyptic number.

21455105111522 is a deficient number, since it is larger than the sum of its proper divisors (11040242678110).

21455105111522 is a wasteful number, since it uses less digits than its factorization.

21455105111522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 760153.

The product of its (nonzero) digits is 20000, while the sum is 35.

Adding to 21455105111522 its reverse (22511150155412), we get a palindrome (43966255266934).

The spelling of 21455105111522 in words is "twenty-one trillion, four hundred fifty-five billion, one hundred five million, one hundred eleven thousand, five hundred twenty-two".