21212000103 has 16 divisors (see below), whose sum is σ = 32643081216. Its totient is φ = 12001130400.

The previous prime is 21212000081. The next prime is 21212000107. The reversal of 21212000103 is 30100021212.

It is not a de Polignac number, because 21212000103 - 2⁵ = 21212000071 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21212000107) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4998351 + ... + 5002592.

It is an arithmetic number, because the mean of its divisors is an integer number (2040192576).

Almost surely, 2^21212000103 is an apocalyptic number.

21212000103 is a deficient number, since it is larger than the sum of its proper divisors (11431081113).

21212000103 is a wasteful number, since it uses less digits than its factorization.

21212000103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10001054.

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 21212000103 its reverse (30100021212), we get a palindrome (51312021315).

The spelling of 21212000103 in words is "twenty-one billion, two hundred twelve million, one hundred three", and thus it is an aban number.