210111221210 has 64 divisors (see below), whose sum is σ = 422779167360. Its totient is φ = 74520794880.

The previous prime is 210111221077. The next prime is 210111221219. The reversal of 210111221210 is 12122111012.

It is not an unprimeable number, because it can be changed into a prime (210111221219) 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, 3322244 + ... + 3384896.

It is an arithmetic number, because the mean of its divisors is an integer number (6605924490).

Almost surely, 2^210111221210 is an apocalyptic number.

210111221210 is an abundant number, since it is smaller than the sum of its proper divisors (212667946150).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

210111221210 is a wasteful number, since it uses less digits than its factorization.

210111221210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63423.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 210111221210 its reverse (12122111012), we get a palindrome (222233332222).

The spelling of 210111221210 in words is "two hundred ten billion, one hundred eleven million, two hundred twenty-one thousand, two hundred ten".