212204202443381 has 2 divisors, whose sum is σ = 212204202443382. Its totient is φ = 212204202443380.

The previous prime is 212204202443371. The next prime is 212204202443411. The reversal of 212204202443381 is 183344202402212.

212204202443381 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., 212018498331025 + 185704112356 = 14560855^2 + 430934^2 .

It is a cyclic number.

It is not a de Polignac number, because 212204202443381 - 2²⁶ = 212204135334517 is a prime.

It is a super-2 number, since 2×212204202443381² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212204202443371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106102101221690 + 106102101221691.

It is an arithmetic number, because the mean of its divisors is an integer number (106102101221691).

Almost surely, 2^{212204202443381} is an apocalyptic number.

It is an amenable number.

212204202443381 is a deficient number, since it is larger than the sum of its proper divisors (1).

212204202443381 is an equidigital number, since it uses as much as digits as its factorization.

212204202443381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 147456, while the sum is 38.

Adding to 212204202443381 its reverse (183344202402212), we get a palindrome (395548404845593).

The spelling of 212204202443381 in words is "two hundred twelve trillion, two hundred four billion, two hundred two million, four hundred forty-three thousand, three hundred eighty-one".