21212222120110 has 32 divisors (see below), whose sum is σ = 43637283771840. Its totient is φ = 7272643110912.

The previous prime is 21212222120081. The next prime is 21212222120129. The reversal of 21212222120110 is 1102122221212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1898056 + ... + 6784324.

It is an arithmetic number, because the mean of its divisors is an integer number (1363665117870).

Almost surely, 2^{21212222120110} is an apocalyptic number.

21212222120110 is an abundant number, since it is smaller than the sum of its proper divisors (22425061651730).

21212222120110 is a wasteful number, since it uses less digits than its factorization.

21212222120110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4948300.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 21212222120110 its reverse (1102122221212), we get a palindrome (22314344341322).

The spelling of 21212222120110 in words is "twenty-one trillion, two hundred twelve billion, two hundred twenty-two million, one hundred twenty thousand, one hundred ten".