21102110219 has 16 divisors (see below), whose sum is σ = 22742482752. Its totient is φ = 19532418048.

The previous prime is 21102110203. The next prime is 21102110257. The reversal of 21102110219 is 91201120112.

It is a cyclic number.

It is not a de Polignac number, because 21102110219 - 2⁴ = 21102110203 is a prime.

It is a super-2 number, since 2×21102110219² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21102110219.

It is not an unprimeable number, because it can be changed into a prime (21102110279) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29582 + ... + 207555.

It is an arithmetic number, because the mean of its divisors is an integer number (1421405172).

Almost surely, 2^21102110219 is an apocalyptic number.

21102110219 is a deficient number, since it is larger than the sum of its proper divisors (1640372533).

21102110219 is a wasteful number, since it uses less digits than its factorization.

21102110219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237286.

The product of its (nonzero) digits is 72, while the sum is 20.

The spelling of 21102110219 in words is "twenty-one billion, one hundred two million, one hundred ten thousand, two hundred nineteen".