200122621 has 2 divisors, whose sum is σ = 200122622. Its totient is φ = 200122620.

The previous prime is 200122619. The next prime is 200122633. The reversal of 200122621 is 126221002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 119661721 + 80460900 = 10939^2 + 8970^2 .

It is a cyclic number.

It is not a de Polignac number, because 200122621 - 2¹ = 200122619 is a prime.

Together with 200122619, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 200122595 and 200122604.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (200122651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100061310 + 100061311.

It is an arithmetic number, because the mean of its divisors is an integer number (100061311).

Almost surely, 2^200122621 is an apocalyptic number.

It is an amenable number.

200122621 is a deficient number, since it is larger than the sum of its proper divisors (1).

200122621 is an equidigital number, since it uses as much as digits as its factorization.

200122621 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.

The square root of 200122621 is about 14146.4702664658. The cubic root of 200122621 is about 584.9230385521.

Adding to 200122621 its reverse (126221002), we get a palindrome (326343623).

The spelling of 200122621 in words is "two hundred million, one hundred twenty-two thousand, six hundred twenty-one".