101385439181 has 4 divisors (see below), whose sum is σ = 109184319132. Its totient is φ = 93586559232.

The previous prime is 101385439157. The next prime is 101385439189. The reversal of 101385439181 is 181934583101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 181934583101 = 179 ⋅1016394319.

It can be written as a sum of positive squares in 2 ways, for example, as 47441196100 + 53944243081 = 217810^2 + 232259^2 .

It is a cyclic number.

It is not a de Polignac number, because 101385439181 - 2¹⁰ = 101385438157 is a prime.

It is a super-2 number, since 2×101385439181² (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 (101385439189) 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, 3899439956 + ... + 3899439981.

It is an arithmetic number, because the mean of its divisors is an integer number (27296079783).

Almost surely, 2^101385439181 is an apocalyptic number.

It is an amenable number.

101385439181 is a deficient number, since it is larger than the sum of its proper divisors (7798879951).

101385439181 is an equidigital number, since it uses as much as digits as its factorization.

101385439181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7798879950.

The product of its (nonzero) digits is 103680, while the sum is 44.

The spelling of 101385439181 in words is "one hundred one billion, three hundred eighty-five million, four hundred thirty-nine thousand, one hundred eighty-one".