21112021433 has 2 divisors, whose sum is σ = 21112021434. Its totient is φ = 21112021432.

The previous prime is 21112021409. The next prime is 21112021457. The reversal of 21112021433 is 33412021112.

It is a balanced prime because it is at equal distance from previous prime (21112021409) and next prime (21112021457).

It can be written as a sum of positive squares in only one way, i.e., 16525616704 + 4586404729 = 128552^2 + 67723^2 .

It is a cyclic number.

It is not a de Polignac number, because 21112021433 - 2⁶ = 21112021369 is a prime.

It is not a weakly prime, because it can be changed into another prime (21112021033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10556010716 + 10556010717.

It is an arithmetic number, because the mean of its divisors is an integer number (10556010717).

Almost surely, 2^21112021433 is an apocalyptic number.

It is an amenable number.

21112021433 is a deficient number, since it is larger than the sum of its proper divisors (1).

21112021433 is an equidigital number, since it uses as much as digits as its factorization.

21112021433 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 21112021433 its reverse (33412021112), we get a palindrome (54524042545).

The spelling of 21112021433 in words is "twenty-one billion, one hundred twelve million, twenty-one thousand, four hundred thirty-three".