21010212112222 has 8 divisors (see below), whose sum is σ = 31678609972896. Its totient is φ = 10450675454592.

The previous prime is 21010212112199. The next prime is 21010212112271. The reversal of 21010212112222 is 22221121201012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 21010212112222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27215300278 + ... + 27215301049.

It is an arithmetic number, because the mean of its divisors is an integer number (3959826246612).

Almost surely, 2^{21010212112222} is an apocalyptic number.

21010212112222 is a deficient number, since it is larger than the sum of its proper divisors (10668397860674).

21010212112222 is a wasteful number, since it uses less digits than its factorization.

21010212112222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54430601522.

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

Adding to 21010212112222 its reverse (22221121201012), we get a palindrome (43231333313234).

The spelling of 21010212112222 in words is "twenty-one trillion, ten billion, two hundred twelve million, one hundred twelve thousand, two hundred twenty-two".