211120221101 has 2 divisors, whose sum is σ = 211120221102. Its totient is φ = 211120221100.

The previous prime is 211120221097. The next prime is 211120221139. The reversal of 211120221101 is 101122021112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 178802968201 + 32317252900 = 422851^2 + 179770^2 .

It is a cyclic number.

It is not a de Polignac number, because 211120221101 - 2² = 211120221097 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211120251101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105560110550 + 105560110551.

It is an arithmetic number, because the mean of its divisors is an integer number (105560110551).

Almost surely, 2^211120221101 is an apocalyptic number.

It is an amenable number.

211120221101 is a deficient number, since it is larger than the sum of its proper divisors (1).

211120221101 is an equidigital number, since it uses as much as digits as its factorization.

211120221101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 211120221101 its reverse (101122021112), we get a palindrome (312242242213).

The spelling of 211120221101 in words is "two hundred eleven billion, one hundred twenty million, two hundred twenty-one thousand, one hundred one".