21001100230016 has 64 divisors (see below), whose sum is σ = 41862501564000. Its totient is φ = 10494435409920.

The previous prime is 21001100230007. The next prime is 21001100230039. The reversal of 21001100230016 is 61003200110012.

It is a tau number, because it is divible by the number of its divisors (64).

It is a junction number, because it is equal to n+sod(n) for n = 21001100229976 and 21001100230003.

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, 2442268085 + ... + 2442276683.

Almost surely, 2^{21001100230016} is an apocalyptic number.

It is an amenable number.

21001100230016 is a deficient number, since it is larger than the sum of its proper divisors (20861401333984).

21001100230016 is an equidigital number, since it uses as much as digits as its factorization.

21001100230016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17507 (or 17495 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 21001100230016 its reverse (61003200110012), we get a palindrome (82004300340028).

The spelling of 21001100230016 in words is "twenty-one trillion, one billion, one hundred million, two hundred thirty thousand, sixteen".