3121200001 has 4 divisors (see below), whose sum is σ = 3221883904. Its totient is φ = 3020516100.

The previous prime is 3121199971. The next prime is 3121200013. The reversal of 3121200001 is 1000021213.

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: 1000021213 = 8929 ⋅111997.

It is a cyclic number.

It is not a de Polignac number, because 3121200001 - 2¹⁹ = 3120675713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3121200301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50341905 + ... + 50341966.

It is an arithmetic number, because the mean of its divisors is an integer number (805470976).

Almost surely, 2^3121200001 is an apocalyptic number.

3121200001 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

3121200001 is a deficient number, since it is larger than the sum of its proper divisors (100683903).

3121200001 is a wasteful number, since it uses less digits than its factorization.

3121200001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100683902.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 3121200001 is about 55867.7008744767. The cubic root of 3121200001 is about 1461.4160279709.

Adding to 3121200001 its reverse (1000021213), we get a palindrome (4121221214).

The spelling of 3121200001 in words is "three billion, one hundred twenty-one million, two hundred thousand, one".