21142101142 has 8 divisors (see below), whose sum is σ = 32233039632. Its totient is φ = 10397754600.

The previous prime is 21142101089. The next prime is 21142101181. The reversal of 21142101142 is 24110124112.

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 polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86647834 + ... + 86648077.

It is an arithmetic number, because the mean of its divisors is an integer number (4029129954).

Almost surely, 2^21142101142 is an apocalyptic number.

21142101142 is a deficient number, since it is larger than the sum of its proper divisors (11090938490).

21142101142 is a wasteful number, since it uses less digits than its factorization.

21142101142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173295974.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 21142101142 its reverse (24110124112), we get a palindrome (45252225254).

The spelling of 21142101142 in words is "twenty-one billion, one hundred forty-two million, one hundred one thousand, one hundred forty-two".