101115505501 has 4 divisors (see below), whose sum is σ = 104602247100. Its totient is φ = 97628763904.

The previous prime is 101115505499. The next prime is 101115505507. The reversal of 101115505501 is 105505511101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 105505511101 = 2161 ⋅48822541.

It can be written as a sum of positive squares in 2 ways, for example, as 82119499225 + 18996006276 = 286565^2 + 137826^2 .

It is a cyclic number.

It is not a de Polignac number, because 101115505501 - 2¹ = 101115505499 is a prime.

It is a super-2 number, since 2×101115505501² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101115505507) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1743370756 + ... + 1743370813.

It is an arithmetic number, because the mean of its divisors is an integer number (26150561775).

Almost surely, 2^101115505501 is an apocalyptic number.

It is an amenable number.

101115505501 is a deficient number, since it is larger than the sum of its proper divisors (3486741599).

101115505501 is an equidigital number, since it uses as much as digits as its factorization.

101115505501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3486741598.

The product of its (nonzero) digits is 625, while the sum is 25.

The spelling of 101115505501 in words is "one hundred one billion, one hundred fifteen million, five hundred five thousand, five hundred one".