101261243249 has 2 divisors, whose sum is σ = 101261243250. Its totient is φ = 101261243248.

The previous prime is 101261243201. The next prime is 101261243263. The reversal of 101261243249 is 942342162101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 100920582400 + 340660849 = 317680^2 + 18457^2 .

It is a cyclic number.

It is not a de Polignac number, because 101261243249 - 2³² = 96966275953 is a prime.

It is not a weakly prime, because it can be changed into another prime (101261242249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50630621624 + 50630621625.

It is an arithmetic number, because the mean of its divisors is an integer number (50630621625).

Almost surely, 2^101261243249 is an apocalyptic number.

It is an amenable number.

101261243249 is a deficient number, since it is larger than the sum of its proper divisors (1).

101261243249 is an equidigital number, since it uses as much as digits as its factorization.

101261243249 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 35.

The spelling of 101261243249 in words is "one hundred one billion, two hundred sixty-one million, two hundred forty-three thousand, two hundred forty-nine".