21040122112433 has 6 divisors (see below), whose sum is σ = 21099894831894. Its totient is φ = 20980518242816.

The previous prime is 21040122112421. The next prime is 21040122112439. The reversal of 21040122112433 is 33421122104012.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 255340217344 + 20784781895089 = 505312^2 + 4559033^2 .

It is not a de Polignac number, because 21040122112433 - 2¹⁸ = 21040121850289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21040122112439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 84299960 + ... + 84549177.

It is an arithmetic number, because the mean of its divisors is an integer number (3516649138649).

Almost surely, 2^{21040122112433} is an apocalyptic number.

It is an amenable number.

21040122112433 is a deficient number, since it is larger than the sum of its proper divisors (59772719461).

21040122112433 is an frugal number, since it uses more digits than its factorization.

21040122112433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168849843 (or 168849490 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

Adding to 21040122112433 its reverse (33421122104012), we get a palindrome (54461244216445).

The spelling of 21040122112433 in words is "twenty-one trillion, forty billion, one hundred twenty-two million, one hundred twelve thousand, four hundred thirty-three".