3121010201 has 4 divisors (see below), whose sum is σ = 3125412900. Its totient is φ = 3116607504.

The previous prime is 3121010197. The next prime is 3121010203. The reversal of 3121010201 is 1020101213.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1044840976 + 2076169225 = 32324^2 + 45565^2 .

It is a cyclic number.

It is not a de Polignac number, because 3121010201 - 2² = 3121010197 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3121010203) 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, 2200286 + ... + 2201703.

It is an arithmetic number, because the mean of its divisors is an integer number (781353225).

Almost surely, 2^3121010201 is an apocalyptic number.

It is an amenable number.

3121010201 is a deficient number, since it is larger than the sum of its proper divisors (4402699).

3121010201 is an equidigital number, since it uses as much as digits as its factorization.

3121010201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4402698.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 3121010201 is about 55866.0021927469. The cubic root of 3121010201 is about 1461.3864044944.

Adding to 3121010201 its reverse (1020101213), we get a palindrome (4141111414).

The spelling of 3121010201 in words is "three billion, one hundred twenty-one million, ten thousand, two hundred one".