21212132333 has 4 divisors (see below), whose sum is σ = 24242436960. Its totient is φ = 18181827708.

The previous prime is 21212132327. The next prime is 21212132339. The reversal of 21212132333 is 33323121212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (21212132327) and next prime (21212132339).

It is a cyclic number.

It is not a de Polignac number, because 21212132333 - 2⁶ = 21212132269 is a prime.

It is a super-2 number, since 2×21212132333² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21212132299 and 21212132308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21212132339) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1515152303 + ... + 1515152316.

It is an arithmetic number, because the mean of its divisors is an integer number (6060609240).

Almost surely, 2^21212132333 is an apocalyptic number.

It is an amenable number.

21212132333 is a deficient number, since it is larger than the sum of its proper divisors (3030304627).

21212132333 is an equidigital number, since it uses as much as digits as its factorization.

21212132333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3030304626.

The product of its digits is 1296, while the sum is 23.

Adding to 21212132333 its reverse (33323121212), we get a palindrome (54535253545).

The spelling of 21212132333 in words is "twenty-one billion, two hundred twelve million, one hundred thirty-two thousand, three hundred thirty-three".