221122222210 has 16 divisors (see below), whose sum is σ = 410859355392. Its totient is φ = 85595698800.

The previous prime is 221122222207. The next prime is 221122222247. The reversal of 221122222210 is 12222221122.

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, 356648436 + ... + 356649055.

It is an arithmetic number, because the mean of its divisors is an integer number (25678709712).

Almost surely, 2^221122222210 is an apocalyptic number.

221122222210 is a deficient number, since it is larger than the sum of its proper divisors (189737133182).

221122222210 is a wasteful number, since it uses less digits than its factorization.

221122222210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 713297529.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 221122222210 its reverse (12222221122), we get a palindrome (233344443332).

The spelling of 221122222210 in words is "two hundred twenty-one billion, one hundred twenty-two million, two hundred twenty-two thousand, two hundred ten".