200020210126021 has 2 divisors, whose sum is σ = 200020210126022. Its totient is φ = 200020210126020.

The previous prime is 200020210126007. The next prime is 200020210126067. The reversal of 200020210126021 is 120621012020002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 112875856733025 + 87144353392996 = 10624305^2 + 9335114^2 .

It is a cyclic number.

It is not a de Polignac number, because 200020210126021 - 2¹³ = 200020210117829 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 200020210126021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (200020210126001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100010105063010 + 100010105063011.

It is an arithmetic number, because the mean of its divisors is an integer number (100010105063011).

Almost surely, 2^{200020210126021} is an apocalyptic number.

It is an amenable number.

200020210126021 is a deficient number, since it is larger than the sum of its proper divisors (1).

200020210126021 is an equidigital number, since it uses as much as digits as its factorization.

200020210126021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 200020210126021 its reverse (120621012020002), we get a palindrome (320641222146023).

The spelling of 200020210126021 in words is "two hundred trillion, twenty billion, two hundred ten million, one hundred twenty-six thousand, twenty-one".