2011222121121 has 12 divisors (see below), whose sum is σ = 2906463183780. Its totient is φ = 1340184948480.

The previous prime is 2011222121119. The next prime is 2011222121141. The reversal of 2011222121121 is 1211212221102.

2011222121121 is a `hidden beast` number, since 201 + 1 + 222 + 121 + 121 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 205853671521 + 1805368449600 = 453711^2 + 1343640^2 .

It is not a de Polignac number, because 2011222121121 - 2¹ = 2011222121119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2011222121094 and 2011222121103.

It is not an unprimeable number, because it can be changed into a prime (2011222121141) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 52463020 + ... + 52501341.

It is an arithmetic number, because the mean of its divisors is an integer number (242205265315).

Almost surely, 2^{2011222121121} is an apocalyptic number.

It is an amenable number.

2011222121121 is a deficient number, since it is larger than the sum of its proper divisors (895241062659).

2011222121121 is a wasteful number, since it uses less digits than its factorization.

2011222121121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104966496 (or 104966493 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 2011222121121 its reverse (1211212221102), we get a palindrome (3222434342223).

The spelling of 2011222121121 in words is "two trillion, eleven billion, two hundred twenty-two million, one hundred twenty-one thousand, one hundred twenty-one".