200221010021 has 2 divisors, whose sum is σ = 200221010022. Its totient is φ = 200221010020.

The previous prime is 200221010009. The next prime is 200221010047. The reversal of 200221010021 is 120010122002.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 125192130625 + 75028879396 = 353825^2 + 273914^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-200221010021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 200221009984 and 200221010011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (200221010221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100110505010 + 100110505011.

It is an arithmetic number, because the mean of its divisors is an integer number (100110505011).

Almost surely, 2^200221010021 is an apocalyptic number.

It is an amenable number.

200221010021 is a deficient number, since it is larger than the sum of its proper divisors (1).

200221010021 is an equidigital number, since it uses as much as digits as its factorization.

200221010021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 200221010021 its reverse (120010122002), we get a palindrome (320231132023).

The spelling of 200221010021 in words is "two hundred billion, two hundred twenty-one million, ten thousand, twenty-one".