212012641 has 2 divisors, whose sum is σ = 212012642. Its totient is φ = 212012640.

The previous prime is 212012639. The next prime is 212012683. The reversal of 212012641 is 146210212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 139830625 + 72182016 = 11825^2 + 8496^2 .

It is a cyclic number.

It is not a de Polignac number, because 212012641 - 2¹ = 212012639 is a prime.

Together with 212012639, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (212012611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106006320 + 106006321.

It is an arithmetic number, because the mean of its divisors is an integer number (106006321).

Almost surely, 2^212012641 is an apocalyptic number.

It is an amenable number.

212012641 is a deficient number, since it is larger than the sum of its proper divisors (1).

212012641 is an equidigital number, since it uses as much as digits as its factorization.

212012641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 212012641 is about 14560.6538658125. The cubic root of 212012641 is about 596.2850469374.

Adding to 212012641 its reverse (146210212), we get a palindrome (358222853).

The spelling of 212012641 in words is "two hundred twelve million, twelve thousand, six hundred forty-one".