21010113020542 has 16 divisors (see below), whose sum is σ = 31998093987600. Its totient is φ = 10344204718848.

The previous prime is 21010113020459. The next prime is 21010113020569. The reversal of 21010113020542 is 24502031101012.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30414003 + ... + 31097134.

It is an arithmetic number, because the mean of its divisors is an integer number (1999880874225).

Almost surely, 2^{21010113020542} is an apocalyptic number.

21010113020542 is a deficient number, since it is larger than the sum of its proper divisors (10987980967058).

21010113020542 is a wasteful number, since it uses less digits than its factorization.

21010113020542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61513755.

The product of its (nonzero) digits is 480, while the sum is 22.

Adding to 21010113020542 its reverse (24502031101012), we get a palindrome (45512144121554).

The spelling of 21010113020542 in words is "twenty-one trillion, ten billion, one hundred thirteen million, twenty thousand, five hundred forty-two".