21201133433 has 2 divisors, whose sum is σ = 21201133434. Its totient is φ = 21201133432.

The previous prime is 21201133391. The next prime is 21201133439. The reversal of 21201133433 is 33433110212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14528204089 + 6672929344 = 120533^2 + 81688^2 .

It is a cyclic number.

It is not a de Polignac number, because 21201133433 - 2²² = 21196939129 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21201133399 and 21201133408.

It is not a weakly prime, because it can be changed into another prime (21201133439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10600566716 + 10600566717.

It is an arithmetic number, because the mean of its divisors is an integer number (10600566717).

Almost surely, 2^21201133433 is an apocalyptic number.

It is an amenable number.

21201133433 is a deficient number, since it is larger than the sum of its proper divisors (1).

21201133433 is an equidigital number, since it uses as much as digits as its factorization.

21201133433 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 21201133433 its reverse (33433110212), we get a palindrome (54634243645).

The spelling of 21201133433 in words is "twenty-one billion, two hundred one million, one hundred thirty-three thousand, four hundred thirty-three".