3121240201 has 4 divisors (see below), whose sum is σ = 3138484804. Its totient is φ = 3103995600.

The previous prime is 3121240193. The next prime is 3121240207. The reversal of 3121240201 is 1020421213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1020421213 = 7 ⋅145774459.

It can be written as a sum of positive squares in 2 ways, for example, as 24206400 + 3097033801 = 4920^2 + 55651^2 .

It is a cyclic number.

It is not a de Polignac number, because 3121240201 - 2³ = 3121240193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3121240207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8622030 + ... + 8622391.

It is an arithmetic number, because the mean of its divisors is an integer number (784621201).

Almost surely, 2^3121240201 is an apocalyptic number.

It is an amenable number.

3121240201 is a deficient number, since it is larger than the sum of its proper divisors (17244603).

3121240201 is a wasteful number, since it uses less digits than its factorization.

3121240201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17244602.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 3121240201 is about 55868.0606518608. The cubic root of 3121240201 is about 1461.4223021253.

Adding to 3121240201 its reverse (1020421213), we get a palindrome (4141661414).

The spelling of 3121240201 in words is "three billion, one hundred twenty-one million, two hundred forty thousand, two hundred one".