21401030042 has 8 divisors (see below), whose sum is σ = 36687480096. Its totient is φ = 9171870012.

The previous prime is 21401030011. The next prime is 21401030059. The reversal of 21401030042 is 24003010412.

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

It is a self number, because there is not a number n which added to its sum of digits gives 21401030042.

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, 764322488 + ... + 764322515.

It is an arithmetic number, because the mean of its divisors is an integer number (4585935012).

Almost surely, 2^21401030042 is an apocalyptic number.

21401030042 is a deficient number, since it is larger than the sum of its proper divisors (15286450054).

21401030042 is a wasteful number, since it uses less digits than its factorization.

21401030042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1528645012.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 21401030042 its reverse (24003010412), we get a palindrome (45404040454).

The spelling of 21401030042 in words is "twenty-one billion, four hundred one million, thirty thousand, forty-two".