101140261 has 2 divisors, whose sum is σ = 101140262. Its totient is φ = 101140260.

The previous prime is 101140243. The next prime is 101140283. The reversal of 101140261 is 162041101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52056225 + 49084036 = 7215^2 + 7006^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-101140261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101140241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50570130 + 50570131.

It is an arithmetic number, because the mean of its divisors is an integer number (50570131).

Almost surely, 2^101140261 is an apocalyptic number.

It is an amenable number.

101140261 is a deficient number, since it is larger than the sum of its proper divisors (1).

101140261 is an equidigital number, since it uses as much as digits as its factorization.

101140261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 101140261 is about 10056.8514456563. The cubic root of 101140261 is about 465.9164275704.

Adding to 101140261 its reverse (162041101), we get a palindrome (263181362).

The spelling of 101140261 in words is "one hundred one million, one hundred forty thousand, two hundred sixty-one".