20221020211121 has 4 divisors (see below), whose sum is σ = 20225301609072. Its totient is φ = 20216738813172.

The previous prime is 20221020211037. The next prime is 20221020211123. The reversal of 20221020211121 is 12111202012202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20221020211121 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20221020211121.

It is not an unprimeable number, because it can be changed into a prime (20221020211123) 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 3 ways as a sum of consecutive naturals, for example, 2140691891 + ... + 2140701336.

It is an arithmetic number, because the mean of its divisors is an integer number (5056325402268).

Almost surely, 2^{20221020211121} is an apocalyptic number.

It is an amenable number.

20221020211121 is a deficient number, since it is larger than the sum of its proper divisors (4281397951).

20221020211121 is an equidigital number, since it uses as much as digits as its factorization.

20221020211121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4281397950.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 20221020211121 its reverse (12111202012202), we get a palindrome (32332222223323).

The spelling of 20221020211121 in words is "twenty trillion, two hundred twenty-one billion, twenty million, two hundred eleven thousand, one hundred twenty-one".