21131033142 has 8 divisors (see below), whose sum is σ = 42262066296. Its totient is φ = 7043677712.

The previous prime is 21131033117. The next prime is 21131033153. The reversal of 21131033142 is 24133013112.

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

21131033142 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1760919423 + ... + 1760919434.

It is an arithmetic number, because the mean of its divisors is an integer number (5282758287).

Almost surely, 2^21131033142 is an apocalyptic number.

21131033142 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21131033142 is a wasteful number, since it uses less digits than its factorization.

21131033142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3521838862.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 21131033142 its reverse (24133013112), we get a palindrome (45264046254).

The spelling of 21131033142 in words is "twenty-one billion, one hundred thirty-one million, thirty-three thousand, one hundred forty-two".