21210103000 has 32 divisors (see below), whose sum is σ = 49631643360. Its totient is φ = 8484040800.

The previous prime is 21210102983. The next prime is 21210103007. The reversal of 21210103000 is 30101212.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21210103007) 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 7 ways as a sum of consecutive naturals, for example, 10604052 + ... + 10606051.

It is an arithmetic number, because the mean of its divisors is an integer number (1550988855).

Almost surely, 2^21210103000 is an apocalyptic number.

21210103000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21210103000 is an abundant number, since it is smaller than the sum of its proper divisors (28421540360).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21210103000 is a wasteful number, since it uses less digits than its factorization.

21210103000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21210124 (or 21210110 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 10.

Adding to 21210103000 its reverse (30101212), we get a palindrome (21240204212).

The spelling of 21210103000 in words is "twenty-one billion, two hundred ten million, one hundred three thousand".