211222019977 has 2 divisors, whose sum is σ = 211222019978. Its totient is φ = 211222019976.

The previous prime is 211222019971. The next prime is 211222020007. The reversal of 211222019977 is 779910222112.

211222019977 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., 211180687936 + 41332041 = 459544^2 + 6429^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211222019977 is a prime.

It is a super-2 number, since 2×211222019977² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (211222019971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105611009988 + 105611009989.

It is an arithmetic number, because the mean of its divisors is an integer number (105611009989).

Almost surely, 2^211222019977 is an apocalyptic number.

It is an amenable number.

211222019977 is a deficient number, since it is larger than the sum of its proper divisors (1).

211222019977 is an equidigital number, since it uses as much as digits as its factorization.

211222019977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 63504, while the sum is 43.

The spelling of 211222019977 in words is "two hundred eleven billion, two hundred twenty-two million, nineteen thousand, nine hundred seventy-seven".