61217011201 has 2 divisors, whose sum is σ = 61217011202. Its totient is φ = 61217011200.

The previous prime is 61217011187. The next prime is 61217011217. The reversal of 61217011201 is 10211071216.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31170255601 + 30046755600 = 176551^2 + 173340^2 .

It is a cyclic number.

It is not a de Polignac number, because 61217011201 - 2⁷ = 61217011073 is a prime.

It is not a weakly prime, because it can be changed into another prime (61217011231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30608505600 + 30608505601.

It is an arithmetic number, because the mean of its divisors is an integer number (30608505601).

Almost surely, 2^61217011201 is an apocalyptic number.

It is an amenable number.

61217011201 is a deficient number, since it is larger than the sum of its proper divisors (1).

61217011201 is an equidigital number, since it uses as much as digits as its factorization.

61217011201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 168, while the sum is 22.

Adding to 61217011201 its reverse (10211071216), we get a palindrome (71428082417).

The spelling of 61217011201 in words is "sixty-one billion, two hundred seventeen million, eleven thousand, two hundred one".