21010103031142 has 8 divisors (see below), whose sum is σ = 31548645680832. Its totient is φ = 10493887804200.

The previous prime is 21010103031103. The next prime is 21010103031143. The reversal of 21010103031142 is 24113030101012.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21010103031143) 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, 5581853334 + ... + 5581857097.

It is an arithmetic number, because the mean of its divisors is an integer number (3943580710104).

Almost surely, 2^{21010103031142} is an apocalyptic number.

21010103031142 is a deficient number, since it is larger than the sum of its proper divisors (10538542649690).

21010103031142 is a wasteful number, since it uses less digits than its factorization.

21010103031142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11163711374.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 21010103031142 its reverse (24113030101012), we get a palindrome (45123133132154).

The spelling of 21010103031142 in words is "twenty-one trillion, ten billion, one hundred three million, thirty-one thousand, one hundred forty-two".