21000112002143 has 2 divisors, whose sum is σ = 21000112002144. Its totient is φ = 21000112002142.

The previous prime is 21000112002131. The next prime is 21000112002217. The reversal of 21000112002143 is 34120021100012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21000112002143 - 2⁴ = 21000112002127 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21000112002113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10500056001071 + 10500056001072.

It is an arithmetic number, because the mean of its divisors is an integer number (10500056001072).

Almost surely, 2^{21000112002143} is an apocalyptic number.

21000112002143 is a deficient number, since it is larger than the sum of its proper divisors (1).

21000112002143 is an equidigital number, since it uses as much as digits as its factorization.

21000112002143 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 21000112002143 its reverse (34120021100012), we get a palindrome (55120133102155).

The spelling of 21000112002143 in words is "twenty-one trillion, one hundred twelve million, two thousand, one hundred forty-three".