21210231118 has 8 divisors (see below), whose sum is σ = 33686837712. Its totient is φ = 9981285216.

The previous prime is 21210231089. The next prime is 21210231121. The reversal of 21210231118 is 81113201212.

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 pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 311915130 + ... + 311915197.

It is an arithmetic number, because the mean of its divisors is an integer number (4210854714).

Almost surely, 2^21210231118 is an apocalyptic number.

21210231118 is a deficient number, since it is larger than the sum of its proper divisors (12476606594).

21210231118 is a wasteful number, since it uses less digits than its factorization.

21210231118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 623830346.

The product of its (nonzero) digits is 192, while the sum is 22.

The spelling of 21210231118 in words is "twenty-one billion, two hundred ten million, two hundred thirty-one thousand, one hundred eighteen".