1103121321 has 8 divisors (see below), whose sum is σ = 1471340640. Its totient is φ = 735158112.

The previous prime is 1103121307. The next prime is 1103121337. The reversal of 1103121321 is 1231213011.

It is a happy number.

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

It is not a de Polignac number, because 1103121321 - 2¹³ = 1103113129 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1103121321.

It is not an unprimeable number, because it can be changed into a prime (1103121301) 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, 53740 + ... + 71373.

It is an arithmetic number, because the mean of its divisors is an integer number (183917580).

Almost surely, 2^1103121321 is an apocalyptic number.

It is an amenable number.

1103121321 is a deficient number, since it is larger than the sum of its proper divisors (368219319).

1103121321 is a wasteful number, since it uses less digits than its factorization.

1103121321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128055.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 1103121321 is about 33213.2702545233. The cubic root of 1103121321 is about 1033.2555805412.

Adding to 1103121321 its reverse (1231213011), we get a palindrome (2334334332).

The spelling of 1103121321 in words is "one billion, one hundred three million, one hundred twenty-one thousand, three hundred twenty-one".