20224123211 has 4 divisors (see below), whose sum is σ = 20921506800. Its totient is φ = 19526739624.

The previous prime is 20224123207. The next prime is 20224123223. The reversal of 20224123211 is 11232142202.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11232142202 = 2 ⋅5616071101.

It is a cyclic number.

It is not a de Polignac number, because 20224123211 - 2² = 20224123207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20224123411) 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, 348691751 + ... + 348691808.

It is an arithmetic number, because the mean of its divisors is an integer number (5230376700).

Almost surely, 2^20224123211 is an apocalyptic number.

20224123211 is a deficient number, since it is larger than the sum of its proper divisors (697383589).

20224123211 is an equidigital number, since it uses as much as digits as its factorization.

20224123211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 697383588.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 20224123211 its reverse (11232142202), we get a palindrome (31456265413).

The spelling of 20224123211 in words is "twenty billion, two hundred twenty-four million, one hundred twenty-three thousand, two hundred eleven".