2221211211021 has 24 divisors (see below), whose sum is σ = 3594687436704. Its totient is φ = 1309805134560.

The previous prime is 2221211211007. The next prime is 2221211211031. The reversal of 2221211211021 is 1201121121222.

2221211211021 is a `hidden beast` number, since 2 + 221 + 211 + 211 + 0 + 21 = 666.

It is not a de Polignac number, because 2221211211021 - 2¹⁴ = 2221211194637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2221211210985 and 2221211211003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221211211031) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 303191971 + ... + 303199296.

It is an arithmetic number, because the mean of its divisors is an integer number (149778643196).

Almost surely, 2^{2221211211021} is an apocalyptic number.

It is an amenable number.

2221211211021 is a deficient number, since it is larger than the sum of its proper divisors (1373476225683).

2221211211021 is a wasteful number, since it uses less digits than its factorization.

2221211211021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 606391321 (or 606391318 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 2221211211021 its reverse (1201121121222), we get a palindrome (3422332332243).

The spelling of 2221211211021 in words is "two trillion, two hundred twenty-one billion, two hundred eleven million, two hundred eleven thousand, twenty-one".