2211121212011 has 4 divisors (see below), whose sum is σ = 2227028559000. Its totient is φ = 2195213865024.

The previous prime is 2211121212007. The next prime is 2211121212017. The reversal of 2211121212011 is 1102121211122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2211121212011 - 2² = 2211121212007 is a prime.

It is a super-2 number, since 2×2211121212011² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2211121212017) 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, 7953673286 + ... + 7953673563.

It is an arithmetic number, because the mean of its divisors is an integer number (556757139750).

Almost surely, 2^{2211121212011} is an apocalyptic number.

2211121212011 is a deficient number, since it is larger than the sum of its proper divisors (15907346989).

2211121212011 is a wasteful number, since it uses less digits than its factorization.

2211121212011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15907346988.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 2211121212011 its reverse (1102121211122), we get a palindrome (3313242423133).

The spelling of 2211121212011 in words is "two trillion, two hundred eleven billion, one hundred twenty-one million, two hundred twelve thousand, eleven".