21210222111110 has 32 divisors (see below), whose sum is σ = 38290818636000. Its totient is φ = 8459110725120.

The previous prime is 21210222111109. The next prime is 21210222111151. The reversal of 21210222111110 is 1111122201212.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45167825 + ... + 45634995.

It is an arithmetic number, because the mean of its divisors is an integer number (1196588082375).

Almost surely, 2^{21210222111110} is an apocalyptic number.

21210222111110 is a deficient number, since it is larger than the sum of its proper divisors (17080596524890).

21210222111110 is a wasteful number, since it uses less digits than its factorization.

21210222111110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 480536.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 21210222111110 its reverse (1111122201212), we get a palindrome (22321344312322).

The spelling of 21210222111110 in words is "twenty-one trillion, two hundred ten billion, two hundred twenty-two million, one hundred eleven thousand, one hundred ten".