21126616212304 has 40 divisors (see below), whose sum is σ = 42259226847488. Its totient is φ = 10221105968640.

The previous prime is 21126616212179. The next prime is 21126616212389. The reversal of 21126616212304 is 40321261662112.

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, 482419 + ... + 6518125.

Almost surely, 2^{21126616212304} is an apocalyptic number.

It is an amenable number.

21126616212304 is an abundant number, since it is smaller than the sum of its proper divisors (21132610635184).

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

21126616212304 is a wasteful number, since it uses less digits than its factorization.

21126616212304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6042803 (or 6042797 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 37.

Adding to 21126616212304 its reverse (40321261662112), we get a palindrome (61447877874416).

The spelling of 21126616212304 in words is "twenty-one trillion, one hundred twenty-six billion, six hundred sixteen million, two hundred twelve thousand, three hundred four".