20220111001001 has 2 divisors, whose sum is σ = 20220111001002. Its totient is φ = 20220111001000.

The previous prime is 20220111000997. The next prime is 20220111001081. The reversal of 20220111001001 is 10010011102202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16147948439401 + 4072162561600 = 4018451^2 + 2017960^2 .

It is a cyclic number.

It is not a de Polignac number, because 20220111001001 - 2² = 20220111000997 is a prime.

It is not a weakly prime, because it can be changed into another prime (20220111001081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10110055500500 + 10110055500501.

It is an arithmetic number, because the mean of its divisors is an integer number (10110055500501).

Almost surely, 2^{20220111001001} is an apocalyptic number.

It is an amenable number.

20220111001001 is a deficient number, since it is larger than the sum of its proper divisors (1).

20220111001001 is an equidigital number, since it uses as much as digits as its factorization.

20220111001001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 20220111001001 its reverse (10010011102202), we get a palindrome (30230122103203).

The spelling of 20220111001001 in words is "twenty trillion, two hundred twenty billion, one hundred eleven million, one thousand, one".