21120202200277 has 2 divisors, whose sum is σ = 21120202200278. Its totient is φ = 21120202200276.

The previous prime is 21120202200121. The next prime is 21120202200281. The reversal of 21120202200277 is 77200220202112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17737229210481 + 3382972989796 = 4211559^2 + 1839286^2 .

It is a cyclic number.

It is not a de Polignac number, because 21120202200277 - 2²³ = 21120193811669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21120202206277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10560101100138 + 10560101100139.

It is an arithmetic number, because the mean of its divisors is an integer number (10560101100139).

Almost surely, 2^{21120202200277} is an apocalyptic number.

It is an amenable number.

21120202200277 is a deficient number, since it is larger than the sum of its proper divisors (1).

21120202200277 is an equidigital number, since it uses as much as digits as its factorization.

21120202200277 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3136, while the sum is 28.

Adding to 21120202200277 its reverse (77200220202112), we get a palindrome (98320422402389).

The spelling of 21120202200277 in words is "twenty-one trillion, one hundred twenty billion, two hundred two million, two hundred thousand, two hundred seventy-seven".