20221311100121 has 2 divisors, whose sum is σ = 20221311100122. Its totient is φ = 20221311100120.

The previous prime is 20221311099949. The next prime is 20221311100129. The reversal of 20221311100121 is 12100111312202.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19548601104400 + 672709995721 = 4421380^2 + 820189^2 .

It is a cyclic number.

It is not a de Polignac number, because 20221311100121 - 2³⁰ = 20220237358297 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20221311100121.

It is not a weakly prime, because it can be changed into another prime (20221311100129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10110655550060 + 10110655550061.

It is an arithmetic number, because the mean of its divisors is an integer number (10110655550061).

Almost surely, 2^{20221311100121} is an apocalyptic number.

It is an amenable number.

20221311100121 is a deficient number, since it is larger than the sum of its proper divisors (1).

20221311100121 is an equidigital number, since it uses as much as digits as its factorization.

20221311100121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 20221311100121 its reverse (12100111312202), we get a palindrome (32321422412323).

The spelling of 20221311100121 in words is "twenty trillion, two hundred twenty-one billion, three hundred eleven million, one hundred thousand, one hundred twenty-one".