1211233105 has 8 divisors (see below), whose sum is σ = 1457143272. Its totient is φ = 966544128.

The previous prime is 1211233103. The next prime is 1211233123. The reversal of 1211233105 is 5013321121.

It can be written as a sum of positive squares in 4 ways, for example, as 398241936 + 812991169 = 19956^2 + 28513^2 .

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 1211233105 - 2¹ = 1211233103 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1211233103) 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, 303112 + ... + 307081.

It is an arithmetic number, because the mean of its divisors is an integer number (182142909).

Almost surely, 2^1211233105 is an apocalyptic number.

It is an amenable number.

1211233105 is a deficient number, since it is larger than the sum of its proper divisors (245910167).

1211233105 is an equidigital number, since it uses as much as digits as its factorization.

1211233105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 610595.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 1211233105 is about 34802.7743865342. The cubic root of 1211233105 is about 1065.9640971896.

Adding to 1211233105 its reverse (5013321121), we get a palindrome (6224554226).

The spelling of 1211233105 in words is "one billion, two hundred eleven million, two hundred thirty-three thousand, one hundred five".