22211211111021 has 12 divisors (see below), whose sum is σ = 32085468804220. Its totient is φ = 14806270238400.

The previous prime is 22211211111007. The next prime is 22211211111053. The reversal of 22211211111021 is 12011111211222.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 6722539241796 + 15488671869225 = 2592786^2 + 3935565^2 .

It is not a de Polignac number, because 22211211111021 - 2¹⁵ = 22211211078253 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22211211110985 and 22211211111003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22211211111121) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 100202776 + ... + 100424193.

Almost surely, 2^{22211211111021} is an apocalyptic number.

It is an amenable number.

22211211111021 is a deficient number, since it is larger than the sum of its proper divisors (9874257693199).

22211211111021 is a wasteful number, since it uses less digits than its factorization.

22211211111021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200639276 (or 200639273 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 22211211111021 its reverse (12011111211222), we get a palindrome (34222322322243).

The spelling of 22211211111021 in words is "twenty-two trillion, two hundred eleven billion, two hundred eleven million, one hundred eleven thousand, twenty-one".