2112021201221 has 16 divisors (see below), whose sum is σ = 2143668031488. Its totient is φ = 2080449360000.

The previous prime is 2112021201211. The next prime is 2112021201259. The reversal of 2112021201221 is 1221021202112.

It is a cyclic number.

It is not a de Polignac number, because 2112021201221 - 2¹⁴ = 2112021184837 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2112021201221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2112021201211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 415995335 + ... + 416000411.

It is an arithmetic number, because the mean of its divisors is an integer number (133979251968).

Almost surely, 2^{2112021201221} is an apocalyptic number.

It is an amenable number.

2112021201221 is a deficient number, since it is larger than the sum of its proper divisors (31646830267).

2112021201221 is a wasteful number, since it uses less digits than its factorization.

2112021201221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11252.

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

Adding to 2112021201221 its reverse (1221021202112), we get a palindrome (3333042403333).

The spelling of 2112021201221 in words is "two trillion, one hundred twelve billion, twenty-one million, two hundred one thousand, two hundred twenty-one".