12211121201011 has 4 divisors (see below), whose sum is σ = 12218437632400. Its totient is φ = 12203804769624.

The previous prime is 12211121200879. The next prime is 12211121201021. The reversal of 12211121201011 is 11010212111221.

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 12211121201011 - 2¹¹ = 12211121198963 is a prime.

It is a super-2 number, since 2×12211121201011² (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 (12211121201021) 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, 3658213191 + ... + 3658216528.

It is an arithmetic number, because the mean of its divisors is an integer number (3054609408100).

Almost surely, 2^{12211121201011} is an apocalyptic number.

12211121201011 is a deficient number, since it is larger than the sum of its proper divisors (7316431389).

12211121201011 is an equidigital number, since it uses as much as digits as its factorization.

12211121201011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7316431388.

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

Adding to 12211121201011 its reverse (11010212111221), we get a palindrome (23221333312232).

The spelling of 12211121201011 in words is "twelve trillion, two hundred eleven billion, one hundred twenty-one million, two hundred one thousand, eleven".