211142104421 has 2 divisors, whose sum is σ = 211142104422. Its totient is φ = 211142104420.

The previous prime is 211142104417. The next prime is 211142104451. The reversal of 211142104421 is 124401241112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 172153627396 + 38988477025 = 414914^2 + 197455^2 .

It is a cyclic number.

It is not a de Polignac number, because 211142104421 - 2² = 211142104417 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211142104451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105571052210 + 105571052211.

It is an arithmetic number, because the mean of its divisors is an integer number (105571052211).

Almost surely, 2^211142104421 is an apocalyptic number.

It is an amenable number.

211142104421 is a deficient number, since it is larger than the sum of its proper divisors (1).

211142104421 is an equidigital number, since it uses as much as digits as its factorization.

211142104421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 512, while the sum is 23.

Adding to 211142104421 its reverse (124401241112), we get a palindrome (335543345533).

The spelling of 211142104421 in words is "two hundred eleven billion, one hundred forty-two million, one hundred four thousand, four hundred twenty-one".