212610321377 has 2 divisors, whose sum is σ = 212610321378. Its totient is φ = 212610321376.

The previous prime is 212610321359. The next prime is 212610321401. The reversal of 212610321377 is 773123016212.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 211787721616 + 822599761 = 460204^2 + 28681^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212610321377 is a prime.

It is a super-2 number, since 2×212610321377² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (212610321277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106305160688 + 106305160689.

It is an arithmetic number, because the mean of its divisors is an integer number (106305160689).

Almost surely, 2^212610321377 is an apocalyptic number.

It is an amenable number.

212610321377 is a deficient number, since it is larger than the sum of its proper divisors (1).

212610321377 is an equidigital number, since it uses as much as digits as its factorization.

212610321377 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21168, while the sum is 35.

Adding to 212610321377 its reverse (773123016212), we get a palindrome (985733337589).

The spelling of 212610321377 in words is "two hundred twelve billion, six hundred ten million, three hundred twenty-one thousand, three hundred seventy-seven".