200200120621 has 2 divisors, whose sum is σ = 200200120622. Its totient is φ = 200200120620.

The previous prime is 200200120619. The next prime is 200200120657. The reversal of 200200120621 is 126021002002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 186549703396 + 13650417225 = 431914^2 + 116835^2 .

It is a cyclic number.

It is not a de Polignac number, because 200200120621 - 2¹ = 200200120619 is a prime.

Together with 200200120619, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 200200120595 and 200200120604.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (200200120921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100100060310 + 100100060311.

It is an arithmetic number, because the mean of its divisors is an integer number (100100060311).

Almost surely, 2^200200120621 is an apocalyptic number.

It is an amenable number.

200200120621 is a deficient number, since it is larger than the sum of its proper divisors (1).

200200120621 is an equidigital number, since it uses as much as digits as its factorization.

200200120621 is an evil number, because the sum of its binary digits is even.

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

Adding to 200200120621 its reverse (126021002002), we get a palindrome (326221122623).

The spelling of 200200120621 in words is "two hundred billion, two hundred million, one hundred twenty thousand, six hundred twenty-one".