21010112212222 has 32 divisors (see below), whose sum is σ = 36227623772160. Its totient is φ = 8951885812800.

The previous prime is 21010112212147. The next prime is 21010112212253. The reversal of 21010112212222 is 22221221101012.

It is a self number, because there is not a number n which added to its sum of digits gives 21010112212222.

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, 3141279 + ... + 7203322.

It is an arithmetic number, because the mean of its divisors is an integer number (1132113242880).

Almost surely, 2^{21010112212222} is an apocalyptic number.

21010112212222 is a deficient number, since it is larger than the sum of its proper divisors (15217511559938).

21010112212222 is a wasteful number, since it uses less digits than its factorization.

21010112212222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10345456.

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

Adding to 21010112212222 its reverse (22221221101012), we get a palindrome (43231333313234).

The spelling of 21010112212222 in words is "twenty-one trillion, ten billion, one hundred twelve million, two hundred twelve thousand, two hundred twenty-two".