61230136213 has 2 divisors, whose sum is σ = 61230136214. Its totient is φ = 61230136212.

The previous prime is 61230136211. The next prime is 61230136229. The reversal of 61230136213 is 31263103216.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59466724164 + 1763412049 = 243858^2 + 41993^2 .

It is a cyclic number.

It is not a de Polignac number, because 61230136213 - 2¹ = 61230136211 is a prime.

Together with 61230136211, 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 (61230136211) 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, 30615068106 + 30615068107.

It is an arithmetic number, because the mean of its divisors is an integer number (30615068107).

Almost surely, 2^61230136213 is an apocalyptic number.

It is an amenable number.

61230136213 is a deficient number, since it is larger than the sum of its proper divisors (1).

61230136213 is an equidigital number, since it uses as much as digits as its factorization.

61230136213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 28.

Adding to 61230136213 its reverse (31263103216), we get a palindrome (92493239429).

The spelling of 61230136213 in words is "sixty-one billion, two hundred thirty million, one hundred thirty-six thousand, two hundred thirteen".