21415012110 has 48 divisors (see below), whose sum is σ = 55844330256. Its totient is φ = 5693716224.

The previous prime is 21415012067. The next prime is 21415012127. The reversal of 21415012110 is 1121051412.

21415012110 is a `hidden beast` number, since 2 + 141 + 501 + 21 + 1 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 322704 + ... + 383363.

It is an arithmetic number, because the mean of its divisors is an integer number (1163423547).

Almost surely, 2^21415012110 is an apocalyptic number.

21415012110 is an abundant number, since it is smaller than the sum of its proper divisors (34429318146).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21415012110 is a wasteful number, since it uses less digits than its factorization.

21415012110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 706417 (or 706414 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 18.

Adding to 21415012110 its reverse (1121051412), we get a palindrome (22536063522).

The spelling of 21415012110 in words is "twenty-one billion, four hundred fifteen million, twelve thousand, one hundred ten".