601322011261 has 2 divisors, whose sum is σ = 601322011262. Its totient is φ = 601322011260.

The previous prime is 601322011259. The next prime is 601322011333. The reversal of 601322011261 is 162110223106.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 395483765625 + 205838245636 = 628875^2 + 453694^2 .

It is a cyclic number.

It is not a de Polignac number, because 601322011261 - 2¹ = 601322011259 is a prime.

It is a super-2 number, since 2×601322011261² (a number of 24 digits) contains 22 as substring.

Together with 601322011259, 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 (601326011261) 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, 300661005630 + 300661005631.

It is an arithmetic number, because the mean of its divisors is an integer number (300661005631).

Almost surely, 2^601322011261 is an apocalyptic number.

It is an amenable number.

601322011261 is a deficient number, since it is larger than the sum of its proper divisors (1).

601322011261 is an equidigital number, since it uses as much as digits as its factorization.

601322011261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 25.

Adding to 601322011261 its reverse (162110223106), we get a palindrome (763432234367).

The spelling of 601322011261 in words is "six hundred one billion, three hundred twenty-two million, eleven thousand, two hundred sixty-one".