1321031201 has 16 divisors (see below), whose sum is σ = 1548488448. Its totient is φ = 1103544000.

The previous prime is 1321031191. The next prime is 1321031213. The reversal of 1321031201 is 1021301231.

It is a cyclic number.

It is not a de Polignac number, because 1321031201 - 2¹⁰ = 1321030177 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1321031401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44231 + ... + 67811.

It is an arithmetic number, because the mean of its divisors is an integer number (96780528).

Almost surely, 2^1321031201 is an apocalyptic number.

It is an amenable number.

1321031201 is a deficient number, since it is larger than the sum of its proper divisors (227457247).

1321031201 is a wasteful number, since it uses less digits than its factorization.

1321031201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23792.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 1321031201 is about 36345.9929153132. The cubic root of 1321031201 is about 1097.2468895678.

Adding to 1321031201 its reverse (1021301231), we get a palindrome (2342332432).

The spelling of 1321031201 in words is "one billion, three hundred twenty-one million, thirty-one thousand, two hundred one".