21102020200111 has 8 divisors (see below), whose sum is σ = 21113091648000. Its totient is φ = 21090950653080.

The previous prime is 21102020200067. The next prime is 21102020200127. The reversal of 21102020200111 is 11100202020112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21102020200111 - 2²⁵ = 21101986645679 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21102020200091 and 21102020200100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21102020000111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22011700 + ... + 22950358.

It is an arithmetic number, because the mean of its divisors is an integer number (2639136456000).

Almost surely, 2^{21102020200111} is an apocalyptic number.

21102020200111 is a deficient number, since it is larger than the sum of its proper divisors (11071447889).

21102020200111 is an equidigital number, since it uses as much as digits as its factorization.

21102020200111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 950429.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21102020200111 its reverse (11100202020112), we get a palindrome (32202222220223).

The spelling of 21102020200111 in words is "twenty-one trillion, one hundred two billion, twenty million, two hundred thousand, one hundred eleven".