3121212541 has 2 divisors, whose sum is σ = 3121212542. Its totient is φ = 3121212540.

The previous prime is 3121212533. The next prime is 3121212569. The reversal of 3121212541 is 1452121213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2098556100 + 1022656441 = 45810^2 + 31979^2 .

It is a cyclic number.

It is not a de Polignac number, because 3121212541 - 2³ = 3121212533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3121212581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1560606270 + 1560606271.

It is an arithmetic number, because the mean of its divisors is an integer number (1560606271).

Almost surely, 2^3121212541 is an apocalyptic number.

It is an amenable number.

3121212541 is a deficient number, since it is larger than the sum of its proper divisors (1).

3121212541 is an equidigital number, since it uses as much as digits as its factorization.

3121212541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 480, while the sum is 22.

The square root of 3121212541 is about 55867.8131037899. The cubic root of 3121212541 is about 1461.4179851383.

Adding to 3121212541 its reverse (1452121213), we get a palindrome (4573333754).

The spelling of 3121212541 in words is "three billion, one hundred twenty-one million, two hundred twelve thousand, five hundred forty-one".