21000210110122 has 8 divisors (see below), whose sum is σ = 33353274880836. Its totient is φ = 9882451816512.

The previous prime is 21000210110111. The next prime is 21000210110147. The reversal of 21000210110122 is 22101101200012.

It can be written as a sum of positive squares in 2 ways, for example, as 18252111518001 + 2748098592121 = 4272249^2 + 1657739^2 .

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

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, 308826619233 + ... + 308826619300.

Almost surely, 2^{21000210110122} is an apocalyptic number.

21000210110122 is a deficient number, since it is larger than the sum of its proper divisors (12353064770714).

21000210110122 is a wasteful number, since it uses less digits than its factorization.

21000210110122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 617653238552.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21000210110122 its reverse (22101101200012), we get a palindrome (43101311310134).

The spelling of 21000210110122 in words is "twenty-one trillion, two hundred ten million, one hundred ten thousand, one hundred twenty-two".