2212122221121 has 16 divisors (see below), whose sum is σ = 2984865595200. Its totient is φ = 1457168451648.

The previous prime is 2212122221119. The next prime is 2212122221143. The reversal of 2212122221121 is 1211222212122.

It is not a de Polignac number, because 2212122221121 - 2¹ = 2212122221119 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2212122221321) 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, 13034826 + ... + 13203443.

It is an arithmetic number, because the mean of its divisors is an integer number (186554099700).

Almost surely, 2^{2212122221121} is an apocalyptic number.

It is an amenable number.

2212122221121 is a deficient number, since it is larger than the sum of its proper divisors (772743374079).

2212122221121 is a wasteful number, since it uses less digits than its factorization.

2212122221121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26238608.

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

Adding to 2212122221121 its reverse (1211222212122), we get a palindrome (3423344433243).

The spelling of 2212122221121 in words is "two trillion, two hundred twelve billion, one hundred twenty-two million, two hundred twenty-one thousand, one hundred twenty-one".