21200430232277 has 2 divisors, whose sum is σ = 21200430232278. Its totient is φ = 21200430232276.

The previous prime is 21200430232211. The next prime is 21200430232283. The reversal of 21200430232277 is 77223203400212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14350830486001 + 6849599746276 = 3788249^2 + 2617174^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21200430232277 is a prime.

It is a super-2 number, since 2×21200430232277² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21200430235277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10600215116138 + 10600215116139.

It is an arithmetic number, because the mean of its divisors is an integer number (10600215116139).

Almost surely, 2^{21200430232277} is an apocalyptic number.

It is an amenable number.

21200430232277 is a deficient number, since it is larger than the sum of its proper divisors (1).

21200430232277 is an equidigital number, since it uses as much as digits as its factorization.

21200430232277 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56448, while the sum is 35.

Adding to 21200430232277 its reverse (77223203400212), we get a palindrome (98423633632489).

The spelling of 21200430232277 in words is "twenty-one trillion, two hundred billion, four hundred thirty million, two hundred thirty-two thousand, two hundred seventy-seven".