1211331104 has 12 divisors (see below), whose sum is σ = 2384808174. Its totient is φ = 605665536.

The previous prime is 1211331089. The next prime is 1211331119. The reversal of 1211331104 is 4011331121.

It is an interprime number because it is at equal distance from previous prime (1211331089) and next prime (1211331119).

It can be written as a sum of positive squares in only one way, i.e., 1106227600 + 105103504 = 33260^2 + 10252^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18927017 + ... + 18927080.

Almost surely, 2^1211331104 is an apocalyptic number.

It is an amenable number.

1211331104 is a deficient number, since it is larger than the sum of its proper divisors (1173477070).

1211331104 is an equidigital number, since it uses as much as digits as its factorization.

1211331104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37854107 (or 37854099 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 1211331104 is about 34804.1822774218. The cubic root of 1211331104 is about 1065.9928449172.

Adding to 1211331104 its sum of digits (17), we get a palindrome (1211331121).

Adding to 1211331104 its reverse (4011331121), we get a palindrome (5222662225).

The spelling of 1211331104 in words is "one billion, two hundred eleven million, three hundred thirty-one thousand, one hundred four".