2212012020221 has 4 divisors (see below), whose sum is σ = 2214178536444. Its totient is φ = 2209845504000.

The previous prime is 2212012020191. The next prime is 2212012020223. The reversal of 2212012020221 is 1220202102122.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 583864092100 + 1628147928121 = 764110^2 + 1275989^2 .

It is a cyclic number.

It is not a de Polignac number, because 2212012020221 - 2¹⁰ = 2212012019197 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 2212012020221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2212012020223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1083256580 + ... + 1083258621.

It is an arithmetic number, because the mean of its divisors is an integer number (553544634111).

Almost surely, 2^{2212012020221} is an apocalyptic number.

It is an amenable number.

2212012020221 is a deficient number, since it is larger than the sum of its proper divisors (2166516223).

2212012020221 is a wasteful number, since it uses less digits than its factorization.

2212012020221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2166516222.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 2212012020221 its reverse (1220202102122), we get a palindrome (3432214122343).

It can be divided in two parts, 221201 and 2020221, that added together give a palindrome (2241422).

The spelling of 2212012020221 in words is "two trillion, two hundred twelve billion, twelve million, twenty thousand, two hundred twenty-one".