20112212121211 has 4 divisors (see below), whose sum is σ = 22985385281392. Its totient is φ = 17239038961032.

The previous prime is 20112212121179. The next prime is 20112212121217. The reversal of 20112212121211 is 11212121221102.

It is a happy number.

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

It is not a de Polignac number, because 20112212121211 - 2⁵ = 20112212121179 is a prime.

It is a super-2 number, since 2×20112212121211² (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 (20112212121217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1436586580080 + ... + 1436586580093.

It is an arithmetic number, because the mean of its divisors is an integer number (5746346320348).

Almost surely, 2^{20112212121211} is an apocalyptic number.

20112212121211 is a deficient number, since it is larger than the sum of its proper divisors (2873173160181).

20112212121211 is an equidigital number, since it uses as much as digits as its factorization.

20112212121211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2873173160180.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 20112212121211 its reverse (11212121221102), we get a palindrome (31324333342313).

The spelling of 20112212121211 in words is "twenty trillion, one hundred twelve billion, two hundred twelve million, one hundred twenty-one thousand, two hundred eleven".