21100203034 has 8 divisors (see below), whose sum is σ = 31651271028. Its totient is φ = 10549779360.

The previous prime is 21100203031. The next prime is 21100203053. The reversal of 21100203034 is 43030200112.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 21040372809 + 59830225 = 145053^2 + 7735^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 21100202999 and 21100203017.

It is not an unprimeable number, because it can be changed into a prime (21100203031) by changing a digit.

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, 68587 + ... + 216574.

Almost surely, 2^21100203034 is an apocalyptic number.

21100203034 is a deficient number, since it is larger than the sum of its proper divisors (10551067994).

21100203034 is a wasteful number, since it uses less digits than its factorization.

21100203034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322160.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 21100203034 its reverse (43030200112), we get a palindrome (64130403146).

The spelling of 21100203034 in words is "twenty-one billion, one hundred million, two hundred three thousand, thirty-four".