21213133232230 has 16 divisors (see below), whose sum is σ = 38185825676544. Its totient is φ = 8484767546560.

The previous prime is 21213133232171. The next prime is 21213133232237. The reversal of 21213133232230 is 3223233131212.

It is a happy number.

It is a super-2 number, since 2×21213133232230² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21213133232237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60534847 + ... + 60884266.

It is an arithmetic number, because the mean of its divisors is an integer number (2386614104784).

Almost surely, 2^{21213133232230} is an apocalyptic number.

21213133232230 is a deficient number, since it is larger than the sum of its proper divisors (16972692444314).

21213133232230 is a wasteful number, since it uses less digits than its factorization.

21213133232230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121436591.

The product of its (nonzero) digits is 7776, while the sum is 28.

Adding to 21213133232230 its reverse (3223233131212), we get a palindrome (24436366363442).

The spelling of 21213133232230 in words is "twenty-one trillion, two hundred thirteen billion, one hundred thirty-three million, two hundred thirty-two thousand, two hundred thirty".