21200011142 has 8 divisors (see below), whose sum is σ = 31850414832. Its totient is φ = 10583206200.

The previous prime is 21200011139. The next prime is 21200011169. The reversal of 21200011142 is 24111000212.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8398109 + ... + 8400632.

It is an arithmetic number, because the mean of its divisors is an integer number (3981301854).

Almost surely, 2^21200011142 is an apocalyptic number.

21200011142 is a deficient number, since it is larger than the sum of its proper divisors (10650403690).

21200011142 is a wasteful number, since it uses less digits than its factorization.

21200011142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16799374.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21200011142 its reverse (24111000212), we get a palindrome (45311011354).

The spelling of 21200011142 in words is "twenty-one billion, two hundred million, eleven thousand, one hundred forty-two".