1222222121121 has 16 divisors (see below), whose sum is σ = 1715439852800. Its totient is φ = 771911587728.

The previous prime is 1222222121119. The next prime is 1222222121123. The reversal of 1222222121121 is 1211212222221.

It is an interprime number because it is at equal distance from previous prime (1222222121119) and next prime (1222222121123).

It is not a de Polignac number, because 1222222121121 - 2¹ = 1222222121119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1222222121123) 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, 2439690 + ... + 2897676.

It is an arithmetic number, because the mean of its divisors is an integer number (107214990800).

Almost surely, 2^{1222222121121} is an apocalyptic number.

It is an amenable number.

1222222121121 is a deficient number, since it is larger than the sum of its proper divisors (493217731679).

1222222121121 is a wasteful number, since it uses less digits than its factorization.

1222222121121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 504828.

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

Adding to 1222222121121 its reverse (1211212222221), we get a palindrome (2433434343342).

The spelling of 1222222121121 in words is "one trillion, two hundred twenty-two billion, two hundred twenty-two million, one hundred twenty-one thousand, one hundred twenty-one".