211010999977 has 2 divisors, whose sum is σ = 211010999978. Its totient is φ = 211010999976.

The previous prime is 211010999959. The next prime is 211011000001. The reversal of 211010999977 is 779999010112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 210703032576 + 307967401 = 459024^2 + 17549^2 .

It is a cyclic number.

It is not a de Polignac number, because 211010999977 - 2¹¹ = 211010997929 is a prime.

It is a super-2 number, since 2×211010999977² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (211010999917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105505499988 + 105505499989.

It is an arithmetic number, because the mean of its divisors is an integer number (105505499989).

Almost surely, 2^211010999977 is an apocalyptic number.

It is an amenable number.

211010999977 is a deficient number, since it is larger than the sum of its proper divisors (1).

211010999977 is an equidigital number, since it uses as much as digits as its factorization.

211010999977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 642978, while the sum is 55.

The spelling of 211010999977 in words is "two hundred eleven billion, ten million, nine hundred ninety-nine thousand, nine hundred seventy-seven".