21211214033 has 2 divisors, whose sum is σ = 21211214034. Its totient is φ = 21211214032.

The previous prime is 21211214029. The next prime is 21211214071. The reversal of 21211214033 is 33041211212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19851964609 + 1359249424 = 140897^2 + 36868^2 .

It is a cyclic number.

It is not a de Polignac number, because 21211214033 - 2² = 21211214029 is a prime.

It is a super-2 number, since 2×21211214033² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21211213996 and 21211214014.

It is not a weakly prime, because it can be changed into another prime (21211214083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10605607016 + 10605607017.

It is an arithmetic number, because the mean of its divisors is an integer number (10605607017).

Almost surely, 2^21211214033 is an apocalyptic number.

It is an amenable number.

21211214033 is a deficient number, since it is larger than the sum of its proper divisors (1).

21211214033 is an equidigital number, since it uses as much as digits as its factorization.

21211214033 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 21211214033 its reverse (33041211212), we get a palindrome (54252425245).

The spelling of 21211214033 in words is "twenty-one billion, two hundred eleven million, two hundred fourteen thousand, thirty-three".