21521422545110 has 16 divisors (see below), whose sum is σ = 38738674310400. Its totient is φ = 8608543744896.

The previous prime is 21521422545107. The next prime is 21521422545137. The reversal of 21521422545110 is 1154522412512.

It is a congruent 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, 634286 + ... + 6591294.

It is an arithmetic number, because the mean of its divisors is an integer number (2421167144400).

Almost surely, 2^{21521422545110} is an apocalyptic number.

21521422545110 is a deficient number, since it is larger than the sum of its proper divisors (17217251765290).

21521422545110 is a wasteful number, since it uses less digits than its factorization.

21521422545110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6318295.

The product of its (nonzero) digits is 32000, while the sum is 35.

Adding to 21521422545110 its reverse (1154522412512), we get a palindrome (22675944957622).

The spelling of 21521422545110 in words is "twenty-one trillion, five hundred twenty-one billion, four hundred twenty-two million, five hundred forty-five thousand, one hundred ten".