1321211104 has 24 divisors (see below), whose sum is σ = 2613475368. Its totient is φ = 657471360.

The previous prime is 1321211093. The next prime is 1321211107. The reversal of 1321211104 is 4011121231.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321211107) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 91087 + ... + 104590.

It is an arithmetic number, because the mean of its divisors is an integer number (108894807).

Almost surely, 2^1321211104 is an apocalyptic number.

It is an amenable number.

1321211104 is a deficient number, since it is larger than the sum of its proper divisors (1292264264).

1321211104 is a wasteful number, since it uses less digits than its factorization.

1321211104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195898 (or 195890 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 1321211104 is about 36348.4676981025. The cubic root of 1321211104 is about 1097.2966963771.

Adding to 1321211104 its reverse (4011121231), we get a palindrome (5332332335).

It can be divided in two parts, 132121 and 1104, that added together give a square (133225 = 365²).

The spelling of 1321211104 in words is "one billion, three hundred twenty-one million, two hundred eleven thousand, one hundred four".