21212242245334 has 48 divisors (see below), whose sum is σ = 38962016755200. Its totient is φ = 8612322331536.

The previous prime is 21212242245323. The next prime is 21212242245347. The reversal of 21212242245334 is 43354224221212.

It is a junction number, because it is equal to n+sod(n) for n = 21212242245293 and 21212242245302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 152687187 + ... + 152826049.

It is an arithmetic number, because the mean of its divisors is an integer number (811708682400).

Almost surely, 2^{21212242245334} is an apocalyptic number.

21212242245334 is a deficient number, since it is larger than the sum of its proper divisors (17749774509866).

21212242245334 is a wasteful number, since it uses less digits than its factorization.

21212242245334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220937 (or 220930 counting only the distinct ones).

The product of its digits is 184320, while the sum is 37.

Adding to 21212242245334 its reverse (43354224221212), we get a palindrome (64566466466546).

The spelling of 21212242245334 in words is "twenty-one trillion, two hundred twelve billion, two hundred forty-two million, two hundred forty-five thousand, three hundred thirty-four".