12211121121011 has 4 divisors (see below), whose sum is σ = 12358243062312. Its totient is φ = 12063999179712.

The previous prime is 12211121120941. The next prime is 12211121121013. The reversal of 12211121121011 is 11012112111221.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12211121121011 is a prime.

It is a super-2 number, since 2×12211121121011² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12211121121013) 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, 73560970526 + ... + 73560970691.

It is an arithmetic number, because the mean of its divisors is an integer number (3089560765578).

Almost surely, 2^{12211121121011} is an apocalyptic number.

12211121121011 is a deficient number, since it is larger than the sum of its proper divisors (147121941301).

12211121121011 is an equidigital number, since it uses as much as digits as its factorization.

12211121121011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147121941300.

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 12211121121011 its reverse (11012112111221), we get a palindrome (23223233232232).

The spelling of 12211121121011 in words is "twelve trillion, two hundred eleven billion, one hundred twenty-one million, one hundred twenty-one thousand, eleven".