21110354115 has 16 divisors (see below), whose sum is σ = 34866134016. Its totient is φ = 10895666400.

The previous prime is 21110354059. The next prime is 21110354131. The reversal of 21110354115 is 51145301112.

It is not a de Polignac number, because 21110354115 - 2¹⁶ = 21110288579 is a prime.

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, 22698841 + ... + 22699770.

It is an arithmetic number, because the mean of its divisors is an integer number (2179133376).

Almost surely, 2^21110354115 is an apocalyptic number.

21110354115 is a deficient number, since it is larger than the sum of its proper divisors (13755779901).

21110354115 is a wasteful number, since it uses less digits than its factorization.

21110354115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45398650.

The product of its (nonzero) digits is 600, while the sum is 24.

Adding to 21110354115 its reverse (51145301112), we get a palindrome (72255655227).

The spelling of 21110354115 in words is "twenty-one billion, one hundred ten million, three hundred fifty-four thousand, one hundred fifteen".