20121244433 has 2 divisors, whose sum is σ = 20121244434. Its totient is φ = 20121244432.

The previous prime is 20121244379. The next prime is 20121244459. The reversal of 20121244433 is 33444212102.

It is an a-pointer prime, because the next prime (20121244459) can be obtained adding 20121244433 to its sum of digits (26).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11580342544 + 8540901889 = 107612^2 + 92417^2 .

It is a cyclic number.

It is not a de Polignac number, because 20121244433 - 2³⁰ = 19047502609 is a prime.

It is not a weakly prime, because it can be changed into another prime (20121244933) 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 as a sum of consecutive naturals, namely, 10060622216 + 10060622217.

It is an arithmetic number, because the mean of its divisors is an integer number (10060622217).

Almost surely, 2^20121244433 is an apocalyptic number.

It is an amenable number.

20121244433 is a deficient number, since it is larger than the sum of its proper divisors (1).

20121244433 is an equidigital number, since it uses as much as digits as its factorization.

20121244433 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 20121244433 its reverse (33444212102), we get a palindrome (53565456535).

The spelling of 20121244433 in words is "twenty billion, one hundred twenty-one million, two hundred forty-four thousand, four hundred thirty-three".