212012077 has 2 divisors, whose sum is σ = 212012078. Its totient is φ = 212012076.

The previous prime is 212012071. The next prime is 212012123. The reversal of 212012077 is 770210212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 193599396 + 18412681 = 13914^2 + 4291^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212012077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212012071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106006038 + 106006039.

It is an arithmetic number, because the mean of its divisors is an integer number (106006039).

Almost surely, 2^212012077 is an apocalyptic number.

It is an amenable number.

212012077 is a deficient number, since it is larger than the sum of its proper divisors (1).

212012077 is an equidigital number, since it uses as much as digits as its factorization.

212012077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 392, while the sum is 22.

The square root of 212012077 is about 14560.6344985375. The cubic root of 212012077 is about 596.2845181873.

Adding to 212012077 its reverse (770210212), we get a palindrome (982222289).

The spelling of 212012077 in words is "two hundred twelve million, twelve thousand, seventy-seven".