2222222251121 has 2 divisors, whose sum is σ = 2222222251122. Its totient is φ = 2222222251120.

The previous prime is 2222222251111. The next prime is 2222222251147. The reversal of 2222222251121 is 1211522222222.

It is an a-pointer prime, because the next prime (2222222251147) can be obtained adding 2222222251121 to its sum of digits (26).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2221947984400 + 274266721 = 1490620^2 + 16561^2 .

It is a cyclic number.

It is not a de Polignac number, because 2222222251121 - 2³⁴ = 2205042381937 is a prime.

It is a super-3 number, since 3×2222222251121³ (a number of 38 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (2222222251111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1111111125560 + 1111111125561.

It is an arithmetic number, because the mean of its divisors is an integer number (1111111125561).

Almost surely, 2^{2222222251121} is an apocalyptic number.

It is an amenable number.

2222222251121 is a deficient number, since it is larger than the sum of its proper divisors (1).

2222222251121 is an equidigital number, since it uses as much as digits as its factorization.

2222222251121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2560, while the sum is 26.

Adding to 2222222251121 its reverse (1211522222222), we get a palindrome (3433744473343).

The spelling of 2222222251121 in words is "two trillion, two hundred twenty-two billion, two hundred twenty-two million, two hundred fifty-one thousand, one hundred twenty-one".