3121021201 has 4 divisors (see below), whose sum is σ = 3121482304. Its totient is φ = 3120560100.

The previous prime is 3121021181. The next prime is 3121021207. The reversal of 3121021201 is 1021201213.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1021201213 = 6337 ⋅161149.

It is a cyclic number.

It is not a de Polignac number, because 3121021201 - 2²¹ = 3118924049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3121021207) 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, 220245 + ... + 233986.

It is an arithmetic number, because the mean of its divisors is an integer number (780370576).

Almost surely, 2^3121021201 is an apocalyptic number.

It is an amenable number.

3121021201 is a deficient number, since it is larger than the sum of its proper divisors (461103).

3121021201 is an equidigital number, since it uses as much as digits as its factorization.

3121021201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 461102.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 3121021201 is about 55866.1006425184. The cubic root of 3121021201 is about 1461.3881213778.

Adding to 3121021201 its reverse (1021201213), we get a palindrome (4142222414).

The spelling of 3121021201 in words is "three billion, one hundred twenty-one million, twenty-one thousand, two hundred one".