21000202002127 has 2 divisors, whose sum is σ = 21000202002128. Its totient is φ = 21000202002126.

The previous prime is 21000202002089. The next prime is 21000202002139. The reversal of 21000202002127 is 72120020200012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21000202002127 - 2³¹ = 20998054518479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21000202002167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10500101001063 + 10500101001064.

It is an arithmetic number, because the mean of its divisors is an integer number (10500101001064).

Almost surely, 2^{21000202002127} is an apocalyptic number.

21000202002127 is a deficient number, since it is larger than the sum of its proper divisors (1).

21000202002127 is an equidigital number, since it uses as much as digits as its factorization.

21000202002127 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 21000202002127 its reverse (72120020200012), we get a palindrome (93120222202139).

The spelling of 21000202002127 in words is "twenty-one trillion, two hundred two million, two thousand, one hundred twenty-seven".