210312212977 has 2 divisors, whose sum is σ = 210312212978. Its totient is φ = 210312212976.

The previous prime is 210312212927. The next prime is 210312213037. The reversal of 210312212977 is 779212213012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 200206133136 + 10106079841 = 447444^2 + 100529^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-210312212977 is a prime.

It is not a weakly prime, because it can be changed into another prime (210312212927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105156106488 + 105156106489.

It is an arithmetic number, because the mean of its divisors is an integer number (105156106489).

Almost surely, 2^210312212977 is an apocalyptic number.

It is an amenable number.

210312212977 is a deficient number, since it is larger than the sum of its proper divisors (1).

210312212977 is an equidigital number, since it uses as much as digits as its factorization.

210312212977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21168, while the sum is 37.

Adding to 210312212977 its reverse (779212213012), we get a palindrome (989524425989).

The spelling of 210312212977 in words is "two hundred ten billion, three hundred twelve million, two hundred twelve thousand, nine hundred seventy-seven".