5312121802609 has 2 divisors, whose sum is σ = 5312121802610. Its totient is φ = 5312121802608.

The previous prime is 5312121802579. The next prime is 5312121802619. The reversal of 5312121802609 is 9062081212135.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5089806723600 + 222315079009 = 2256060^2 + 471503^2 .

It is a cyclic number.

It is not a de Polignac number, because 5312121802609 - 2¹¹ = 5312121800561 is a prime.

It is not a weakly prime, because it can be changed into another prime (5312121802619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2656060901304 + 2656060901305.

It is an arithmetic number, because the mean of its divisors is an integer number (2656060901305).

Almost surely, 2^{5312121802609} is an apocalyptic number.

It is an amenable number.

5312121802609 is a deficient number, since it is larger than the sum of its proper divisors (1).

5312121802609 is an equidigital number, since it uses as much as digits as its factorization.

5312121802609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 40.

The spelling of 5312121802609 in words is "five trillion, three hundred twelve billion, one hundred twenty-one million, eight hundred two thousand, six hundred nine".