21212022232284 has 24 divisors (see below), whose sum is σ = 53302004584080. Its totient is φ = 6526776071424.

The previous prime is 21212022232283. The next prime is 21212022232309. The reversal of 21212022232284 is 48223222021212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21212022232283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67987250589 + ... + 67987250900.

It is an arithmetic number, because the mean of its divisors is an integer number (2220916857670).

Almost surely, 2^{21212022232284} is an apocalyptic number.

It is an amenable number.

21212022232284 is an abundant number, since it is smaller than the sum of its proper divisors (32089982351796).

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

21212022232284 is a wasteful number, since it uses less digits than its factorization.

21212022232284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135974501509 (or 135974501507 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 33.

Adding to 21212022232284 its reverse (48223222021212), we get a palindrome (69435244253496).

The spelling of 21212022232284 in words is "twenty-one trillion, two hundred twelve billion, twenty-two million, two hundred thirty-two thousand, two hundred eighty-four".