21201100222011 has 32 divisors (see below), whose sum is σ = 29785484574720. Its totient is φ = 13399341709824.

The previous prime is 21201100222009. The next prime is 21201100222037. The reversal of 21201100222011 is 11022200110212.

It is not a de Polignac number, because 21201100222011 - 2¹ = 21201100222009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21201100222061) 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, 13584315 + ... + 15064388.

It is an arithmetic number, because the mean of its divisors is an integer number (930796392960).

Almost surely, 2^{21201100222011} is an apocalyptic number.

21201100222011 is a deficient number, since it is larger than the sum of its proper divisors (8584384352709).

21201100222011 is a wasteful number, since it uses less digits than its factorization.

21201100222011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28648915.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21201100222011 its reverse (11022200110212), we get a palindrome (32223300332223).

The spelling of 21201100222011 in words is "twenty-one trillion, two hundred one billion, one hundred million, two hundred twenty-two thousand, eleven".