211421340133 has 2 divisors, whose sum is σ = 211421340134. Its totient is φ = 211421340132.

The previous prime is 211421340127. The next prime is 211421340167. The reversal of 211421340133 is 331043124112.

211421340133 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 145876635844 + 65544704289 = 381938^2 + 256017^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211421340133 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 211421340098 and 211421340107.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211421340103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105710670066 + 105710670067.

It is an arithmetic number, because the mean of its divisors is an integer number (105710670067).

Almost surely, 2^211421340133 is an apocalyptic number.

It is an amenable number.

211421340133 is a deficient number, since it is larger than the sum of its proper divisors (1).

211421340133 is an equidigital number, since it uses as much as digits as its factorization.

211421340133 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 211421340133 its reverse (331043124112), we get a palindrome (542464464245).

The spelling of 211421340133 in words is "two hundred eleven billion, four hundred twenty-one million, three hundred forty thousand, one hundred thirty-three".