21212132113203 has 8 divisors (see below), whose sum is σ = 28282882411728. Its totient is φ = 14141401611744.

The previous prime is 21212132113169. The next prime is 21212132113217. The reversal of 21212132113203 is 30231123121212.

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

It is not a de Polignac number, because 21212132113203 - 2²² = 21212127918899 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21212132115203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2236776 + ... + 6886757.

It is an arithmetic number, because the mean of its divisors is an integer number (3535360301466).

Almost surely, 2^{21212132113203} is an apocalyptic number.

21212132113203 is a deficient number, since it is larger than the sum of its proper divisors (7070750298525).

21212132113203 is an equidigital number, since it uses as much as digits as its factorization.

21212132113203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9898533.

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 21212132113203 its reverse (30231123121212), we get a palindrome (51443255234415).

The spelling of 21212132113203 in words is "twenty-one trillion, two hundred twelve billion, one hundred thirty-two million, one hundred thirteen thousand, two hundred three".