211121102077 has 2 divisors, whose sum is σ = 211121102078. Its totient is φ = 211121102076.

The previous prime is 211121102063. The next prime is 211121102131. The reversal of 211121102077 is 770201121112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 186791653636 + 24329448441 = 432194^2 + 155979^2 .

It is a cyclic number.

It is not a de Polignac number, because 211121102077 - 2¹⁵ = 211121069309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211121102057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105560551038 + 105560551039.

It is an arithmetic number, because the mean of its divisors is an integer number (105560551039).

Almost surely, 2^211121102077 is an apocalyptic number.

It is an amenable number.

211121102077 is a deficient number, since it is larger than the sum of its proper divisors (1).

211121102077 is an equidigital number, since it uses as much as digits as its factorization.

211121102077 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 25.

Adding to 211121102077 its reverse (770201121112), we get a palindrome (981322223189).

The spelling of 211121102077 in words is "two hundred eleven billion, one hundred twenty-one million, one hundred two thousand, seventy-seven".