1321312201 has 8 divisors (see below), whose sum is σ = 1461734208. Its totient is φ = 1184274000.

The previous prime is 1321312169. The next prime is 1321312219. The reversal of 1321312201 is 1022131231.

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

It is a cyclic number.

It is not a de Polignac number, because 1321312201 - 2⁵ = 1321312169 is a prime.

It is a super-2 number, since 2×1321312201² = 3491731865022928802, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1321312271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 845130 + ... + 846691.

It is an arithmetic number, because the mean of its divisors is an integer number (182716776).

Almost surely, 2^1321312201 is an apocalyptic number.

1321312201 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1321312201 is a deficient number, since it is larger than the sum of its proper divisors (140422007).

1321312201 is a wasteful number, since it uses less digits than its factorization.

1321312201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1691903.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1321312201 is about 36349.8583353498. The cubic root of 1321312201 is about 1097.3246834702.

Adding to 1321312201 its reverse (1022131231), we get a palindrome (2343443432).

The spelling of 1321312201 in words is "one billion, three hundred twenty-one million, three hundred twelve thousand, two hundred one".