20220100261 has 2 divisors, whose sum is σ = 20220100262. Its totient is φ = 20220100260.

The previous prime is 20220100223. The next prime is 20220100267. The reversal of 20220100261 is 16200102202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19461924036 + 758176225 = 139506^2 + 27535^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20220100261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20220100267) 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 as a sum of consecutive naturals, namely, 10110050130 + 10110050131.

It is an arithmetic number, because the mean of its divisors is an integer number (10110050131).

Almost surely, 2^20220100261 is an apocalyptic number.

It is an amenable number.

20220100261 is a deficient number, since it is larger than the sum of its proper divisors (1).

20220100261 is an equidigital number, since it uses as much as digits as its factorization.

20220100261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 20220100261 its reverse (16200102202), we get a palindrome (36420202463).

The spelling of 20220100261 in words is "twenty billion, two hundred twenty million, one hundred thousand, two hundred sixty-one".