2212212221121 has 8 divisors (see below), whose sum is σ = 3370990051264. Its totient is φ = 1264121269200.

The previous prime is 2212212221119. The next prime is 2212212221123. The reversal of 2212212221121 is 1211222122122.

It is an interprime number because it is at equal distance from previous prime (2212212221119) and next prime (2212212221123).

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

It is not a de Polignac number, because 2212212221121 - 2¹ = 2212212221119 is a prime.

It is a super-2 number, since 2×2212212221121² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 105343439101 = 2212212221121 / (2 + 2 + 1 + 2 + 2 + 1 + 2 + 2 + 2 + 1 + 1 + 2 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2212212221123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52671719530 + ... + 52671719571.

It is an arithmetic number, because the mean of its divisors is an integer number (421373756408).

Almost surely, 2^{2212212221121} is an apocalyptic number.

2212212221121 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2212212221121 is a deficient number, since it is larger than the sum of its proper divisors (1158777830143).

2212212221121 is a wasteful number, since it uses less digits than its factorization.

2212212221121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105343439111.

The product of its digits is 256, while the sum is 21.

Adding to 2212212221121 its reverse (1211222122122), we get a palindrome (3423434343243).

The spelling of 2212212221121 in words is "two trillion, two hundred twelve billion, two hundred twelve million, two hundred twenty-one thousand, one hundred twenty-one".