221012122210 has 32 divisors (see below), whose sum is σ = 434747611584. Its totient is φ = 80227272000.

The previous prime is 221012122193. The next prime is 221012122211. The reversal of 221012122210 is 12221210122.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (221012122211) 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, 1696561 + ... + 1822180.

It is an arithmetic number, because the mean of its divisors is an integer number (13585862862).

Almost surely, 2^221012122210 is an apocalyptic number.

221012122210 is a deficient number, since it is larger than the sum of its proper divisors (213735489374).

221012122210 is a wasteful number, since it uses less digits than its factorization.

221012122210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3519330.

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

Adding to 221012122210 its reverse (12221210122), we get a palindrome (233233332332).

The spelling of 221012122210 in words is "two hundred twenty-one billion, twelve million, one hundred twenty-two thousand, two hundred ten".