221011222210 has 64 divisors (see below), whose sum is σ = 452825095680. Its totient is φ = 77147873280.

The previous prime is 221011222207. The next prime is 221011222291. The reversal of 221011222210 is 12222110122.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 576111 + ... + 879730.

It is an arithmetic number, because the mean of its divisors is an integer number (7075392120).

Almost surely, 2^221011222210 is an apocalyptic number.

221011222210 is an abundant number, since it is smaller than the sum of its proper divisors (231813873470).

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

221011222210 is a wasteful number, since it uses less digits than its factorization.

221011222210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1455931.

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

Adding to 221011222210 its reverse (12222110122), we get a palindrome (233233332332).

It can be divided in two parts, 2210112 and 22210, that added together give a palindrome (2232322).

The spelling of 221011222210 in words is "two hundred twenty-one billion, eleven million, two hundred twenty-two thousand, two hundred ten".