2011122221204 has 12 divisors (see below), whose sum is σ = 3524788345428. Its totient is φ = 1004039836800.

The previous prime is 2011122221189. The next prime is 2011122221209. The reversal of 2011122221204 is 4021222211102.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 569556996100 + 1441565225104 = 754690^2 + 1200652^2 .

It is a super-2 number, since 2×2011122221204² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011122221209) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 380315477 + ... + 380320764.

It is an arithmetic number, because the mean of its divisors is an integer number (293732362119).

Almost surely, 2^{2011122221204} is an apocalyptic number.

It is an amenable number.

2011122221204 is a deficient number, since it is larger than the sum of its proper divisors (1513666124224).

2011122221204 is a wasteful number, since it uses less digits than its factorization.

2011122221204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 760636906 (or 760636904 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 2011122221204 its reverse (4021222211102), we get a palindrome (6032344432306).

The spelling of 2011122221204 in words is "two trillion, eleven billion, one hundred twenty-two million, two hundred twenty-one thousand, two hundred four".