200212220101721 has 2 divisors, whose sum is σ = 200212220101722. Its totient is φ = 200212220101720.

The previous prime is 200212220101639. The next prime is 200212220101753. The reversal of 200212220101721 is 127101022212002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 121330467330121 + 78881752771600 = 11015011^2 + 8881540^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-200212220101721 is a prime.

It is not a weakly prime, because it can be changed into another prime (200212220101781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100106110050860 + 100106110050861.

It is an arithmetic number, because the mean of its divisors is an integer number (100106110050861).

Almost surely, 2^{200212220101721} is an apocalyptic number.

It is an amenable number.

200212220101721 is a deficient number, since it is larger than the sum of its proper divisors (1).

200212220101721 is an equidigital number, since it uses as much as digits as its factorization.

200212220101721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 448, while the sum is 23.

Adding to 200212220101721 its reverse (127101022212002), we get a palindrome (327313242313723).

The spelling of 200212220101721 in words is "two hundred trillion, two hundred twelve billion, two hundred twenty million, one hundred one thousand, seven hundred twenty-one".