211404042373 has 2 divisors, whose sum is σ = 211404042374. Its totient is φ = 211404042372.

The previous prime is 211404042341. The next prime is 211404042427. The reversal of 211404042373 is 373240404112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 131089615969 + 80314426404 = 362063^2 + 283398^2 .

It is a cyclic number.

It is not a de Polignac number, because 211404042373 - 2⁵ = 211404042341 is a prime.

It is a super-2 number, since 2×211404042373² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211404042313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105702021186 + 105702021187.

It is an arithmetic number, because the mean of its divisors is an integer number (105702021187).

Almost surely, 2^211404042373 is an apocalyptic number.

It is an amenable number.

211404042373 is a deficient number, since it is larger than the sum of its proper divisors (1).

211404042373 is an equidigital number, since it uses as much as digits as its factorization.

211404042373 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 31.

Adding to 211404042373 its reverse (373240404112), we get a palindrome (584644446485).

The spelling of 211404042373 in words is "two hundred eleven billion, four hundred four million, forty-two thousand, three hundred seventy-three".