21201112011211 has 32 divisors (see below), whose sum is σ = 23624783170560. Its totient is φ = 18864613152000.

The previous prime is 21201112011199. The next prime is 21201112011221. The reversal of 21201112011211 is 11211021110212.

It is not a de Polignac number, because 21201112011211 - 2⁴³ = 12405018989003 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21201112011221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 550044606 + ... + 550083148.

It is an arithmetic number, because the mean of its divisors is an integer number (738274474080).

Almost surely, 2^{21201112011211} is an apocalyptic number.

21201112011211 is a deficient number, since it is larger than the sum of its proper divisors (2423671159349).

21201112011211 is a wasteful number, since it uses less digits than its factorization.

21201112011211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44307.

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

Adding to 21201112011211 its reverse (11211021110212), we get a palindrome (32412133121423).

Subtracting from 21201112011211 its reverse (11211021110212), we obtain a palindrome (9990090900999).

The spelling of 21201112011211 in words is "twenty-one trillion, two hundred one billion, one hundred twelve million, eleven thousand, two hundred eleven".