1323020121 has 8 divisors (see below), whose sum is σ = 1867793184. Its totient is φ = 830130240.

The previous prime is 1323020119. The next prime is 1323020131. The reversal of 1323020121 is 1210203231.

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

It is not a de Polignac number, because 1323020121 - 2¹ = 1323020119 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1323020121.

It is not an unprimeable number, because it can be changed into a prime (1323020131) 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, 12970735 + ... + 12970836.

It is an arithmetic number, because the mean of its divisors is an integer number (233474148).

Almost surely, 2^1323020121 is an apocalyptic number.

It is an amenable number.

1323020121 is a deficient number, since it is larger than the sum of its proper divisors (544773063).

1323020121 is a wasteful number, since it uses less digits than its factorization.

1323020121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25941591.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 1323020121 is about 36373.3435499130. The cubic root of 1323020121 is about 1097.7972782765.

Adding to 1323020121 its reverse (1210203231), we get a palindrome (2533223352).

The spelling of 1323020121 in words is "one billion, three hundred twenty-three million, twenty thousand, one hundred twenty-one".