21142144142 has 8 divisors (see below), whose sum is σ = 36243675696. Its totient is φ = 9060918912.

The previous prime is 21142144141. The next prime is 21142144169. The reversal of 21142144142 is 24144124112.

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

It is a super-2 number, since 2×21142144142² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21142144141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 755076563 + ... + 755076590.

It is an arithmetic number, because the mean of its divisors is an integer number (4530459462).

Almost surely, 2^21142144142 is an apocalyptic number.

21142144142 is a deficient number, since it is larger than the sum of its proper divisors (15101531554).

21142144142 is a wasteful number, since it uses less digits than its factorization.

21142144142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1510153162.

The product of its digits is 2048, while the sum is 26.

Adding to 21142144142 its reverse (24144124112), we get a palindrome (45286268254).

The spelling of 21142144142 in words is "twenty-one billion, one hundred forty-two million, one hundred forty-four thousand, one hundred forty-two".