101244252561 has 8 divisors (see below), whose sum is σ = 139346928384. Its totient is φ = 65318872560.

The previous prime is 101244252517. The next prime is 101244252569. The reversal of 101244252561 is 165252442101.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 101244252561 - 2²⁵ = 101210698129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (101244252569) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 544323846 + ... + 544324031.

It is an arithmetic number, because the mean of its divisors is an integer number (17418366048).

Almost surely, 2^101244252561 is an apocalyptic number.

It is an amenable number.

101244252561 is a deficient number, since it is larger than the sum of its proper divisors (38102675823).

101244252561 is a wasteful number, since it uses less digits than its factorization.

101244252561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1088647911.

The product of its (nonzero) digits is 19200, while the sum is 33.

Adding to 101244252561 its reverse (165252442101), we get a palindrome (266496694662).

The spelling of 101244252561 in words is "one hundred one billion, two hundred forty-four million, two hundred fifty-two thousand, five hundred sixty-one".