1211340101 has 16 divisors (see below), whose sum is σ = 1255203840. Its totient is φ = 1168493040.

The previous prime is 1211340059. The next prime is 1211340131. The reversal of 1211340101 is 1010431121.

It is a cyclic number.

It is not a de Polignac number, because 1211340101 - 2⁶ = 1211340037 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211340131) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 692510 + ... + 694256.

It is an arithmetic number, because the mean of its divisors is an integer number (78450240).

Almost surely, 2^1211340101 is an apocalyptic number.

It is an amenable number.

1211340101 is a deficient number, since it is larger than the sum of its proper divisors (43863739).

1211340101 is a wasteful number, since it uses less digits than its factorization.

1211340101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2024.

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 1211340101 is about 34804.3115288896. The cubic root of 1211340101 is about 1065.9954840839.

Adding to 1211340101 its reverse (1010431121), we get a palindrome (2221771222).

The spelling of 1211340101 in words is "one billion, two hundred eleven million, three hundred forty thousand, one hundred one".