212141381 has 2 divisors, whose sum is σ = 212141382. Its totient is φ = 212141380.

The previous prime is 212141333. The next prime is 212141389. The reversal of 212141381 is 183141212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 148620481 + 63520900 = 12191^2 + 7970^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212141381 is a prime.

It is a super-2 number, since 2×212141381² = 90007931065174322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212141389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106070690 + 106070691.

It is an arithmetic number, because the mean of its divisors is an integer number (106070691).

Almost surely, 2^212141381 is an apocalyptic number.

It is an amenable number.

212141381 is a deficient number, since it is larger than the sum of its proper divisors (1).

212141381 is an equidigital number, since it uses as much as digits as its factorization.

212141381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 384, while the sum is 23.

The square root of 212141381 is about 14565.0740128569. The cubic root of 212141381 is about 596.4057161637.

Adding to 212141381 its reverse (183141212), we get a palindrome (395282593).

The spelling of 212141381 in words is "two hundred twelve million, one hundred forty-one thousand, three hundred eighty-one".