21122124543321 has 32 divisors (see below), whose sum is σ = 30000463315200. Its totient is φ = 13172898945024.

The previous prime is 21122124543293. The next prime is 21122124543329. The reversal of 21122124543321 is 12334542122112.

It is not a de Polignac number, because 21122124543321 - 2⁶ = 21122124543257 is a prime.

It is a super-2 number, since 2×21122124543321² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21122124543329) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3675396 + ... + 7466778.

It is an arithmetic number, because the mean of its divisors is an integer number (937514478600).

Almost surely, 2^{21122124543321} is an apocalyptic number.

It is an amenable number.

21122124543321 is a deficient number, since it is larger than the sum of its proper divisors (8878338771879).

21122124543321 is a wasteful number, since it uses less digits than its factorization.

21122124543321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3792065.

The product of its digits is 23040, while the sum is 33.

Adding to 21122124543321 its reverse (12334542122112), we get a palindrome (33456666665433).

The spelling of 21122124543321 in words is "twenty-one trillion, one hundred twenty-two billion, one hundred twenty-four million, five hundred forty-three thousand, three hundred twenty-one".