20211424111 has 4 divisors (see below), whose sum is σ = 20908369800. Its totient is φ = 19514478424.

The previous prime is 20211424099. The next prime is 20211424139. The reversal of 20211424111 is 11142411202.

It is a happy number.

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 20211424111 - 2¹³ = 20211415919 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 (20211424511) 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, 348472801 + ... + 348472858.

It is an arithmetic number, because the mean of its divisors is an integer number (5227092450).

Almost surely, 2^20211424111 is an apocalyptic number.

20211424111 is a deficient number, since it is larger than the sum of its proper divisors (696945689).

20211424111 is an equidigital number, since it uses as much as digits as its factorization.

20211424111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 696945688.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 20211424111 its reverse (11142411202), we get a palindrome (31353835313).

The spelling of 20211424111 in words is "twenty billion, two hundred eleven million, four hundred twenty-four thousand, one hundred eleven".