21202100111211 has 8 divisors (see below), whose sum is σ = 29932376627664. Its totient is φ = 13303278501120.

The previous prime is 21202100111201. The next prime is 21202100111221. The reversal of 21202100111211 is 11211100120212.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21202100111201) and next prime (21202100111221).

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

It is not a de Polignac number, because 21202100111211 - 2³⁵ = 21167740372843 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21202100111201) 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, 207863726530 + ... + 207863726631.

It is an arithmetic number, because the mean of its divisors is an integer number (3741547078458).

Almost surely, 2^{21202100111211} is an apocalyptic number.

21202100111211 is a deficient number, since it is larger than the sum of its proper divisors (8730276516453).

21202100111211 is a wasteful number, since it uses less digits than its factorization.

21202100111211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 415727453181.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 21202100111211 its reverse (11211100120212), we get a palindrome (32413200231423).

Subtracting from 21202100111211 its reverse (11211100120212), we obtain a palindrome (9990999990999).

The spelling of 21202100111211 in words is "twenty-one trillion, two hundred two billion, one hundred million, one hundred eleven thousand, two hundred eleven".