21010111001222 has 16 divisors (see below), whose sum is σ = 36017393195520. Its totient is φ = 9004318273608.

The previous prime is 21010111001213. The next prime is 21010111001233. The reversal of 21010111001222 is 22210011101012.

It is a super-2 number, since 2×21010111001222² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 21010111001197 and 21010111001206.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 13209203 + ... + 14714049.

It is an arithmetic number, because the mean of its divisors is an integer number (2251087074720).

Almost surely, 2^{21010111001222} is an apocalyptic number.

21010111001222 is a deficient number, since it is larger than the sum of its proper divisors (15007282194298).

21010111001222 is a wasteful number, since it uses less digits than its factorization.

21010111001222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2502115.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21010111001222 its reverse (22210011101012), we get a palindrome (43220122102234).

The spelling of 21010111001222 in words is "twenty-one trillion, ten billion, one hundred eleven million, one thousand, two hundred twenty-two".