2211112121121 has 8 divisors (see below), whose sum is σ = 3275721660960. Its totient is φ = 1474074747396.

The previous prime is 2211112121107. The next prime is 2211112121161. The reversal of 2211112121121 is 1211212111122.

It is a happy number.

2211112121121 is a `hidden beast` number, since 221 + 111 + 212 + 1 + 121 = 666.

It is not a de Polignac number, because 2211112121121 - 2¹⁰ = 2211112120097 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2211112121094 and 2211112121103.

It is not an unprimeable number, because it can be changed into a prime (2211112121161) 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, 40946520735 + ... + 40946520788.

It is an arithmetic number, because the mean of its divisors is an integer number (409465207620).

Almost surely, 2^{2211112121121} is an apocalyptic number.

It is an amenable number.

2211112121121 is a deficient number, since it is larger than the sum of its proper divisors (1064609539839).

2211112121121 is an equidigital number, since it uses as much as digits as its factorization.

2211112121121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81893041532 (or 81893041526 counting only the distinct ones).

The product of its digits is 32, while the sum is 18.

Adding to 2211112121121 its reverse (1211212111122), we get a palindrome (3422324232243).

Subtracting from 2211112121121 its reverse (1211212111122), we obtain a palindrome (999900009999).

The spelling of 2211112121121 in words is "two trillion, two hundred eleven billion, one hundred twelve million, one hundred twenty-one thousand, one hundred twenty-one".