211420230977 has 2 divisors, whose sum is σ = 211420230978. Its totient is φ = 211420230976.

The previous prime is 211420230943. The next prime is 211420231013. The reversal of 211420230977 is 779032024112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 203149419841 + 8270811136 = 450721^2 + 90944^2 .

It is a cyclic number.

It is not a de Polignac number, because 211420230977 - 2¹⁸ = 211419968833 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 211420230977.

It is not a weakly prime, because it can be changed into another prime (211420230937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105710115488 + 105710115489.

It is an arithmetic number, because the mean of its divisors is an integer number (105710115489).

Almost surely, 2^211420230977 is an apocalyptic number.

It is an amenable number.

211420230977 is a deficient number, since it is larger than the sum of its proper divisors (1).

211420230977 is an equidigital number, since it uses as much as digits as its factorization.

211420230977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 42336, while the sum is 38.

The spelling of 211420230977 in words is "two hundred eleven billion, four hundred twenty million, two hundred thirty thousand, nine hundred seventy-seven".