1211101 has 4 divisors (see below), whose sum is σ = 1214332. Its totient is φ = 1207872.

The previous prime is 1211087. The next prime is 1211141. The reversal of 1211101 is 1011121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1011121 = 79 ⋅12799.

It can be written as a sum of positive squares in 2 ways, for example, as 488601 + 722500 = 699^2 + 850^2 .

It is a cyclic number.

It is not a de Polignac number, because 1211101 - 2¹¹ = 1209053 is a prime.

It is the 1101-st Hogben number.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211141) by changing a digit.

It is a nontrivial repunit in base 1100.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 966 + ... + 1831.

It is an arithmetic number, because the mean of its divisors is an integer number (303583).

2^1211101 is an apocalyptic number.

It is an amenable number.

1211101 is a deficient number, since it is larger than the sum of its proper divisors (3231).

1211101 is an equidigital number, since it uses as much as digits as its factorization.

1211101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3230.

The product of its (nonzero) digits is 2, while the sum is 7.

The square root of 1211101 is about 1100.5003407541. The cubic root of 1211101 is about 106.5925342110.

Adding to 1211101 its reverse (1011121), we get a palindrome (2222222).

Multiplying 1211101 by its reverse (1011121), we get a palindrome (1224569654221).

The spelling of 1211101 in words is "one million, two hundred eleven thousand, one hundred one".