200002020213421 has 2 divisors, whose sum is σ = 200002020213422. Its totient is φ = 200002020213420.

The previous prime is 200002020213389. The next prime is 200002020213427. The reversal of 200002020213421 is 124312020200002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 194931552080521 + 5070468132900 = 13961789^2 + 2251770^2 .

It is a cyclic number.

It is not a de Polignac number, because 200002020213421 - 2⁵ = 200002020213389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (200002020213427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100001010106710 + 100001010106711.

It is an arithmetic number, because the mean of its divisors is an integer number (100001010106711).

Almost surely, 2^{200002020213421} is an apocalyptic number.

It is an amenable number.

200002020213421 is a deficient number, since it is larger than the sum of its proper divisors (1).

200002020213421 is an equidigital number, since it uses as much as digits as its factorization.

200002020213421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 200002020213421 its reverse (124312020200002), we get a palindrome (324314040413423).

The spelling of 200002020213421 in words is "two hundred trillion, two billion, twenty million, two hundred thirteen thousand, four hundred twenty-one".