2211122121011 has 4 divisors (see below), whose sum is σ = 2211167491752. Its totient is φ = 2211076750272.

The previous prime is 2211122120981. The next prime is 2211122121029. The reversal of 2211122121011 is 1101212211122.

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 2211122121011 - 2³⁸ = 1936244214067 is a prime.

It is a super-2 number, since 2×2211122121011² (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 (2211122121031) 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, 22612190 + ... + 22709763.

It is an arithmetic number, because the mean of its divisors is an integer number (552791872938).

Almost surely, 2^{2211122121011} is an apocalyptic number.

2211122121011 is a deficient number, since it is larger than the sum of its proper divisors (45370741).

2211122121011 is an equidigital number, since it uses as much as digits as its factorization.

2211122121011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45370740.

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

Adding to 2211122121011 its reverse (1101212211122), we get a palindrome (3312334332133).

The spelling of 2211122121011 in words is "two trillion, two hundred eleven billion, one hundred twenty-two million, one hundred twenty-one thousand, eleven".