3145020121 has 2 divisors, whose sum is σ = 3145020122. Its totient is φ = 3145020120.

The previous prime is 3145020119. The next prime is 3145020139. The reversal of 3145020121 is 1210205413.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3026210121 + 118810000 = 55011^2 + 10900^2 .

It is a cyclic number.

It is not a de Polignac number, because 3145020121 - 2¹ = 3145020119 is a prime.

It is a super-2 number, since 2×3145020121² = 19782303122989709282, which contains 22 as substring.

Together with 3145020119, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (3145020191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1572510060 + 1572510061.

It is an arithmetic number, because the mean of its divisors is an integer number (1572510061).

Almost surely, 2^3145020121 is an apocalyptic number.

It is an amenable number.

3145020121 is a deficient number, since it is larger than the sum of its proper divisors (1).

3145020121 is an equidigital number, since it uses as much as digits as its factorization.

3145020121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 3145020121 is about 56080.4789655010. The cubic root of 3145020121 is about 1465.1243156513.

Adding to 3145020121 its reverse (1210205413), we get a palindrome (4355225534).

The spelling of 3145020121 in words is "three billion, one hundred forty-five million, twenty thousand, one hundred twenty-one".