21141223142 has 16 divisors (see below), whose sum is σ = 34167247632. Its totient is φ = 9752904480.

The previous prime is 21141223139. The next prime is 21141223153. The reversal of 21141223142 is 24132214112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 134228 + ... + 245559.

It is an arithmetic number, because the mean of its divisors is an integer number (2135452977).

Almost surely, 2^21141223142 is an apocalyptic number.

21141223142 is a deficient number, since it is larger than the sum of its proper divisors (13026024490).

21141223142 is a wasteful number, since it uses less digits than its factorization.

21141223142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381943.

The product of its digits is 768, while the sum is 23.

Adding to 21141223142 its reverse (24132214112), we get a palindrome (45273437254).

The spelling of 21141223142 in words is "twenty-one billion, one hundred forty-one million, two hundred twenty-three thousand, one hundred forty-two".