221012221210 has 16 divisors (see below), whose sum is σ = 433987634592. Its totient is φ = 80368080400.

The previous prime is 221012221193. The next prime is 221012221307. The reversal of 221012221210 is 12122210122.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1004600896 + ... + 1004601115.

It is an arithmetic number, because the mean of its divisors is an integer number (27124227162).

Almost surely, 2^221012221210 is an apocalyptic number.

221012221210 is a deficient number, since it is larger than the sum of its proper divisors (212975413382).

221012221210 is a wasteful number, since it uses less digits than its factorization.

221012221210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2009202029.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 221012221210 its reverse (12122210122), we get a palindrome (233134431332).

The spelling of 221012221210 in words is "two hundred twenty-one billion, twelve million, two hundred twenty-one thousand, two hundred ten".