21222443413111 has 4 divisors (see below), whose sum is σ = 21291571893592. Its totient is φ = 21153314932632.

The previous prime is 21222443413103. The next prime is 21222443413147. The reversal of 21222443413111 is 11131434422212.

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 21222443413111 - 2³ = 21222443413103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21222443413811) 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, 34564239780 + ... + 34564240393.

It is an arithmetic number, because the mean of its divisors is an integer number (5322892973398).

Almost surely, 2^{21222443413111} is an apocalyptic number.

21222443413111 is a deficient number, since it is larger than the sum of its proper divisors (69128480481).

21222443413111 is an equidigital number, since it uses as much as digits as its factorization.

21222443413111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69128480480.

The product of its digits is 9216, while the sum is 31.

Adding to 21222443413111 its reverse (11131434422212), we get a palindrome (32353877835323).

It can be divided in two parts, 2122244 and 3413111, that added together give a palindrome (5535355).

The spelling of 21222443413111 in words is "twenty-one trillion, two hundred twenty-two billion, four hundred forty-three million, four hundred thirteen thousand, one hundred eleven".