1211341211105 has 8 divisors (see below), whose sum is σ = 1453734008232. Its totient is φ = 968989932288.

The previous prime is 1211341211083. The next prime is 1211341211111. The reversal of 1211341211105 is 5011121431121.

It can be written as a sum of positive squares in 4 ways, for example, as 28830681616 + 1182510529489 = 169796^2 + 1087433^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1211341211105 - 2⁴⁰ = 111829583329 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10315352 + ... + 10432121.

It is an arithmetic number, because the mean of its divisors is an integer number (181716751029).

Almost surely, 2^{1211341211105} is an apocalyptic number.

It is an amenable number.

1211341211105 is a deficient number, since it is larger than the sum of its proper divisors (242392797127).

1211341211105 is a wasteful number, since it uses less digits than its factorization.

1211341211105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20759155.

The product of its (nonzero) digits is 240, while the sum is 23.

Adding to 1211341211105 its reverse (5011121431121), we get a palindrome (6222462642226).

The spelling of 1211341211105 in words is "one trillion, two hundred eleven billion, three hundred forty-one million, two hundred eleven thousand, one hundred five".