2220021212221 has 8 divisors (see below), whose sum is σ = 2291677394688. Its totient is φ = 2148367692000.

The previous prime is 2220021212191. The next prime is 2220021212251. The reversal of 2220021212221 is 1222121200222.

It is an interprime number because it is at equal distance from previous prime (2220021212191) and next prime (2220021212251).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2220021212221 - 2¹⁷ = 2220021081149 is a prime.

It is a super-2 number, since 2×2220021212221² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2220021212251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1103841 + ... + 2378761.

It is an arithmetic number, because the mean of its divisors is an integer number (286459674336).

Almost surely, 2^{2220021212221} is an apocalyptic number.

It is an amenable number.

2220021212221 is a deficient number, since it is larger than the sum of its proper divisors (71656182467).

2220021212221 is a wasteful number, since it uses less digits than its factorization.

2220021212221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1331123.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 2220021212221 its reverse (1222121200222), we get a palindrome (3442142412443).

The spelling of 2220021212221 in words is "two trillion, two hundred twenty billion, twenty-one million, two hundred twelve thousand, two hundred twenty-one".