261101222101063 has 2 divisors, whose sum is σ = 261101222101064. Its totient is φ = 261101222101062.

The previous prime is 261101222100949. The next prime is 261101222101201. The reversal of 261101222101063 is 360101222101162.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-261101222101063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (261101222101463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130550611050531 + 130550611050532.

It is an arithmetic number, because the mean of its divisors is an integer number (130550611050532).

Almost surely, 2^{261101222101063} is an apocalyptic number.

261101222101063 is a deficient number, since it is larger than the sum of its proper divisors (1).

261101222101063 is an equidigital number, since it uses as much as digits as its factorization.

261101222101063 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 28.

Subtracting 261101222101063 from its reverse (360101222101162), we obtain a palindrome (99000000000099).

The spelling of 261101222101063 in words is "two hundred sixty-one trillion, one hundred one billion, two hundred twenty-two million, one hundred one thousand, sixty-three".