221210122112210 has 64 divisors (see below), whose sum is σ = 507974871849984. Its totient is φ = 67345153444800.

The previous prime is 221210122112207. The next prime is 221210122112261. The reversal of 221210122112210 is 12211221012122.

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, 3340500296 + ... + 3340566515.

It is an arithmetic number, because the mean of its divisors is an integer number (7937107372656).

Almost surely, 2^{221210122112210} is an apocalyptic number.

221210122112210 is an abundant number, since it is smaller than the sum of its proper divisors (286764749737774).

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

221210122112210 is a wasteful number, since it uses less digits than its factorization.

221210122112210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6681066879.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 221210122112210 its reverse (12211221012122), we get a palindrome (233421343124332).

The spelling of 221210122112210 in words is "two hundred twenty-one trillion, two hundred ten billion, one hundred twenty-two million, one hundred twelve thousand, two hundred ten".