20222121111211 has 4 divisors (see below), whose sum is σ = 20553631293424. Its totient is φ = 19890610929000.

The previous prime is 20222121111197. The next prime is 20222121111223. The reversal of 20222121111211 is 11211112122202.

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 20222121111211 - 2¹¹ = 20222121109163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20222121111281) 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, 165755091015 + ... + 165755091136.

It is an arithmetic number, because the mean of its divisors is an integer number (5138407823356).

Almost surely, 2^{20222121111211} is an apocalyptic number.

20222121111211 is a deficient number, since it is larger than the sum of its proper divisors (331510182213).

20222121111211 is an equidigital number, since it uses as much as digits as its factorization.

20222121111211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331510182212.

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

Adding to 20222121111211 its reverse (11211112122202), we get a palindrome (31433233233413).

The spelling of 20222121111211 in words is "twenty trillion, two hundred twenty-two billion, one hundred twenty-one million, one hundred eleven thousand, two hundred eleven".