200021021047 has 2 divisors, whose sum is σ = 200021021048. Its totient is φ = 200021021046.

The previous prime is 200021020961. The next prime is 200021021077. The reversal of 200021021047 is 740120120002.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-200021021047 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (200021021077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100010510523 + 100010510524.

It is an arithmetic number, because the mean of its divisors is an integer number (100010510524).

Almost surely, 2^200021021047 is an apocalyptic number.

200021021047 is a deficient number, since it is larger than the sum of its proper divisors (1).

200021021047 is an equidigital number, since it uses as much as digits as its factorization.

200021021047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 224, while the sum is 19.

Adding to 200021021047 its reverse (740120120002), we get a palindrome (940141141049).

The spelling of 200021021047 in words is "two hundred billion, twenty-one million, twenty-one thousand, forty-seven".