2212220202221 has 12 divisors (see below), whose sum is σ = 2342962427580. Its totient is φ = 2086263748800.

The previous prime is 2212220202211. The next prime is 2212220202233. The reversal of 2212220202221 is 1222020222122.

It can be written as a sum of positive squares in 2 ways, for example, as 728547602500 + 1483672599721 = 853550^2 + 1218061^2 .

It is not a de Polignac number, because 2212220202221 - 2¹⁴ = 2212220185837 is a prime.

It is a super-2 number, since 2×2212220202221² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2212220202193 and 2212220202202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2212220202211) 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 11 ways as a sum of consecutive naturals, for example, 20574680 + ... + 20681921.

It is an arithmetic number, because the mean of its divisors is an integer number (195246868965).

Almost surely, 2^{2212220202221} is an apocalyptic number.

It is an amenable number.

2212220202221 is a deficient number, since it is larger than the sum of its proper divisors (130742225359).

2212220202221 is an equidigital number, since it uses as much as digits as its factorization.

2212220202221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41256716 (or 41256673 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 2212220202221 its reverse (1222020222122), we get a palindrome (3434240424343).

It can be divided in two parts, 22 and 12220202221, that multiplied together give a palindrome (268844448862).

The spelling of 2212220202221 in words is "two trillion, two hundred twelve billion, two hundred twenty million, two hundred two thousand, two hundred twenty-one".