20112221122211 has 4 divisors (see below), whose sum is σ = 20119784953800. Its totient is φ = 20104657290624.

The previous prime is 20112221122129. The next prime is 20112221122249. The reversal of 20112221122211 is 11222112221102.

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 20112221122211 - 2¹⁴ = 20112221105827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20112221122261) 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, 3781911806 + ... + 3781917123.

It is an arithmetic number, because the mean of its divisors is an integer number (5029946238450).

Almost surely, 2^{20112221122211} is an apocalyptic number.

20112221122211 is a deficient number, since it is larger than the sum of its proper divisors (7563831589).

20112221122211 is an equidigital number, since it uses as much as digits as its factorization.

20112221122211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7563831588.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 20112221122211 its reverse (11222112221102), we get a palindrome (31334333343313).

The spelling of 20112221122211 in words is "twenty trillion, one hundred twelve billion, two hundred twenty-one million, one hundred twenty-two thousand, two hundred eleven".