51201001213 has 2 divisors, whose sum is σ = 51201001214. Its totient is φ = 51201001212.

The previous prime is 51201001211. The next prime is 51201001249. The reversal of 51201001213 is 31210010215.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33833187844 + 17367813369 = 183938^2 + 131787^2 .

It is a cyclic number.

It is not a de Polignac number, because 51201001213 - 2¹ = 51201001211 is a prime.

Together with 51201001211, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51201001211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25600500606 + 25600500607.

It is an arithmetic number, because the mean of its divisors is an integer number (25600500607).

Almost surely, 2^51201001213 is an apocalyptic number.

It is an amenable number.

51201001213 is a deficient number, since it is larger than the sum of its proper divisors (1).

51201001213 is an equidigital number, since it uses as much as digits as its factorization.

51201001213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60, while the sum is 16.

Adding to 51201001213 its reverse (31210010215), we get a palindrome (82411011428).

The spelling of 51201001213 in words is "fifty-one billion, two hundred one million, one thousand, two hundred thirteen".