21010111220222 has 16 divisors (see below), whose sum is σ = 31693289696640. Its totient is φ = 10445688953112.

The previous prime is 21010111220221. The next prime is 21010111220233. The reversal of 21010111220222 is 22202211101012.

It is a self number, because there is not a number n which added to its sum of digits gives 21010111220222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21010111220221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3628463 + ... + 7428725.

It is an arithmetic number, because the mean of its divisors is an integer number (1980830606040).

Almost surely, 2^{21010111220222} is an apocalyptic number.

21010111220222 is a deficient number, since it is larger than the sum of its proper divisors (10683178476418).

21010111220222 is a wasteful number, since it uses less digits than its factorization.

21010111220222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3815887.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21010111220222 its reverse (22202211101012), we get a palindrome (43212322321234).

It can be divided in two parts, 2101011 and 1220222, that added together give a palindrome (3321233).

The spelling of 21010111220222 in words is "twenty-one trillion, ten billion, one hundred eleven million, two hundred twenty thousand, two hundred twenty-two".