221131213210 has 32 divisors (see below), whose sum is σ = 408751080192. Its totient is φ = 86092194240.

The previous prime is 221131213181. The next prime is 221131213211. The reversal of 221131213210 is 12312131122.

It is not an unprimeable number, because it can be changed into a prime (221131213211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1214632 + ... + 1384771.

It is an arithmetic number, because the mean of its divisors is an integer number (12773471256).

Almost surely, 2^221131213210 is an apocalyptic number.

221131213210 is a deficient number, since it is larger than the sum of its proper divisors (187619866982).

221131213210 is a wasteful number, since it uses less digits than its factorization.

221131213210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2599638.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 221131213210 its reverse (12312131122), we get a palindrome (233443344332).

The spelling of 221131213210 in words is "two hundred twenty-one billion, one hundred thirty-one million, two hundred thirteen thousand, two hundred ten".