21201110222210 has 64 divisors (see below), whose sum is σ = 38642505408000. Its totient is φ = 8374211715072.

The previous prime is 21201110222177. The next prime is 21201110222219. The reversal of 21201110222210 is 1222201110212.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21201110222219) 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, 499145534 + ... + 499188006.

It is an arithmetic number, because the mean of its divisors is an integer number (603789147000).

Almost surely, 2^{21201110222210} is an apocalyptic number.

21201110222210 is a deficient number, since it is larger than the sum of its proper divisors (17441395185790).

21201110222210 is a wasteful number, since it uses less digits than its factorization.

21201110222210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44075.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21201110222210 its reverse (1222201110212), we get a palindrome (22423311332422).

The spelling of 21201110222210 in words is "twenty-one trillion, two hundred one billion, one hundred ten million, two hundred twenty-two thousand, two hundred ten".