1201211105 has 8 divisors (see below), whose sum is σ = 1480411752. Its totient is φ = 934996608.

The previous prime is 1201211069. The next prime is 1201211107. The reversal of 1201211105 is 5011121021.

It can be written as a sum of positive squares in 4 ways, for example, as 773507344 + 427703761 = 27812^2 + 20681^2 .

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 1201211105 - 2¹⁸ = 1200948961 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1201211105.

It is not an unprimeable number, because it can be changed into a prime (1201211107) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3246332 + ... + 3246701.

It is an arithmetic number, because the mean of its divisors is an integer number (185051469).

Almost surely, 2^1201211105 is an apocalyptic number.

It is an amenable number.

1201211105 is a deficient number, since it is larger than the sum of its proper divisors (279200647).

1201211105 is an equidigital number, since it uses as much as digits as its factorization.

1201211105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6493075.

The product of its (nonzero) digits is 20, while the sum is 14.

The square root of 1201211105 is about 34658.4925379048. The cubic root of 1201211105 is about 1063.0159465109.

Adding to 1201211105 its reverse (5011121021), we get a palindrome (6212332126).

The spelling of 1201211105 in words is "one billion, two hundred one million, two hundred eleven thousand, one hundred five".