21142102030142 has 4 divisors (see below), whose sum is σ = 31713153045216. Its totient is φ = 10571051015070.

The previous prime is 21142102030141. The next prime is 21142102030193. The reversal of 21142102030142 is 24103020124112.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21142102030141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5285525507534 + ... + 5285525507537.

It is an arithmetic number, because the mean of its divisors is an integer number (7928288261304).

Almost surely, 2^{21142102030142} is an apocalyptic number.

21142102030142 is a deficient number, since it is larger than the sum of its proper divisors (10571051015074).

21142102030142 is a wasteful number, since it uses less digits than its factorization.

21142102030142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10571051015073.

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

Adding to 21142102030142 its reverse (24103020124112), we get a palindrome (45245122154254).

The spelling of 21142102030142 in words is "twenty-one trillion, one hundred forty-two billion, one hundred two million, thirty thousand, one hundred forty-two".