20222121211 has 8 divisors (see below), whose sum is σ = 21319664400. Its totient is φ = 19127900160.

The previous prime is 20222121181. The next prime is 20222121217. The reversal of 20222121211 is 11212122202.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20222121211 - 2¹⁵ = 20222088443 is a prime.

It is a super-2 number, since 2×20222121211² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20222121217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 818026 + ... + 842383.

It is an arithmetic number, because the mean of its divisors is an integer number (2664958050).

Almost surely, 2^20222121211 is an apocalyptic number.

20222121211 is a deficient number, since it is larger than the sum of its proper divisors (1097543189).

20222121211 is a wasteful number, since it uses less digits than its factorization.

20222121211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1661069.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 20222121211 its reverse (11212122202), we get a palindrome (31434243413).

Subtracting from 20222121211 its reverse (11212122202), we obtain a palindrome (9009999009).

The spelling of 20222121211 in words is "twenty billion, two hundred twenty-two million, one hundred twenty-one thousand, two hundred eleven".