221020220012210 has 32 divisors (see below), whose sum is σ = 400519016755200. Its totient is φ = 87811987332928.

The previous prime is 221020220012149. The next prime is 221020220012237. The reversal of 221020220012210 is 12210022020122.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45460679 + ... + 50087061.

It is an arithmetic number, because the mean of its divisors is an integer number (12516219273600).

Almost surely, 2^{221020220012210} is an apocalyptic number.

221020220012210 is a deficient number, since it is larger than the sum of its proper divisors (179498796742990).

221020220012210 is a wasteful number, since it uses less digits than its factorization.

221020220012210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4658602.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 221020220012210 its reverse (12210022020122), we get a palindrome (233230242032332).

The spelling of 221020220012210 in words is "two hundred twenty-one trillion, twenty billion, two hundred twenty million, twelve thousand, two hundred ten".