20221121211 has 16 divisors (see below), whose sum is σ = 27039936000. Its totient is φ = 13441577760.

The previous prime is 20221121197. The next prime is 20221121231. The reversal of 20221121211 is 11212112202.

It is not a de Polignac number, because 20221121211 - 2¹⁸ = 20220859067 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20221121231) 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 15 ways as a sum of consecutive naturals, for example, 1837321 + ... + 1848293.

It is an arithmetic number, because the mean of its divisors is an integer number (1689996000).

Almost surely, 2^20221121211 is an apocalyptic number.

20221121211 is a deficient number, since it is larger than the sum of its proper divisors (6818814789).

20221121211 is a wasteful number, since it uses less digits than its factorization.

20221121211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12706.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 20221121211 its reverse (11212112202), we get a palindrome (31433233413).

Subtracting from 20221121211 its reverse (11212112202), we obtain a palindrome (9009009009).

The spelling of 20221121211 in words is "twenty billion, two hundred twenty-one million, one hundred twenty-one thousand, two hundred eleven".