21002000011143 has 16 divisors (see below), whose sum is σ = 28024119264000. Its totient is φ = 13990611150720.

The previous prime is 21002000011133. The next prime is 21002000011193. The reversal of 21002000011143 is 34111000020012.

It is not a de Polignac number, because 21002000011143 - 2⁴ = 21002000011127 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21002000011133) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20079183 + ... + 21099231.

It is an arithmetic number, because the mean of its divisors is an integer number (1751507454000).

Almost surely, 2^{21002000011143} is an apocalyptic number.

21002000011143 is a deficient number, since it is larger than the sum of its proper divisors (7022119252857).

21002000011143 is a wasteful number, since it uses less digits than its factorization.

21002000011143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1025302.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 21002000011143 its reverse (34111000020012), we get a palindrome (55113000031155).

The spelling of 21002000011143 in words is "twenty-one trillion, two billion, eleven thousand, one hundred forty-three".