21211411033 has 2 divisors, whose sum is σ = 21211411034. Its totient is φ = 21211411032.

The previous prime is 21211411031. The next prime is 21211411051. The reversal of 21211411033 is 33011411212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19780453449 + 1430957584 = 140643^2 + 37828^2 .

It is a cyclic number.

It is not a de Polignac number, because 21211411033 - 2¹ = 21211411031 is a prime.

Together with 21211411031, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 21211411033.

It is not a weakly prime, because it can be changed into another prime (21211411031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10605705516 + 10605705517.

It is an arithmetic number, because the mean of its divisors is an integer number (10605705517).

Almost surely, 2^21211411033 is an apocalyptic number.

It is an amenable number.

21211411033 is a deficient number, since it is larger than the sum of its proper divisors (1).

21211411033 is an equidigital number, since it uses as much as digits as its factorization.

21211411033 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 21211411033 its reverse (33011411212), we get a palindrome (54222822245).

The spelling of 21211411033 in words is "twenty-one billion, two hundred eleven million, four hundred eleven thousand, thirty-three".