221111212222010 has 32 divisors (see below), whose sum is σ = 440129715602112. Its totient is φ = 79302651454080.

The previous prime is 221111212221959. The next prime is 221111212222031. The reversal of 221111212222010 is 10222212111122.

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, 13767813404 + ... + 13767829463.

It is an arithmetic number, because the mean of its divisors is an integer number (13754053612566).

Almost surely, 2^{221111212222010} is an apocalyptic number.

221111212222010 is a deficient number, since it is larger than the sum of its proper divisors (219018503380102).

221111212222010 is a wasteful number, since it uses less digits than its factorization.

221111212222010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27535642958.

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

Adding to 221111212222010 its reverse (10222212111122), we get a palindrome (231333424333132).

The spelling of 221111212222010 in words is "two hundred twenty-one trillion, one hundred eleven billion, two hundred twelve million, two hundred twenty-two thousand, ten".