100711329781 has 4 divisors (see below), whose sum is σ = 101033091532. Its totient is φ = 100389568032.

The previous prime is 100711329749. The next prime is 100711329791. The reversal of 100711329781 is 187923117001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 187923117001 = 433501².

It can be written as a sum of positive squares in 2 ways, for example, as 26599979025 + 74111350756 = 163095^2 + 272234^2 .

It is a cyclic number.

It is not a de Polignac number, because 100711329781 - 2⁵ = 100711329749 is a prime.

It is a super-2 number, since 2×100711329781² (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 (100711329731) 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, 160880406 + ... + 160881031.

It is an arithmetic number, because the mean of its divisors is an integer number (25258272883).

Almost surely, 2^100711329781 is an apocalyptic number.

It is an amenable number.

100711329781 is a deficient number, since it is larger than the sum of its proper divisors (321761751).

100711329781 is an equidigital number, since it uses as much as digits as its factorization.

100711329781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321761750.

The product of its (nonzero) digits is 21168, while the sum is 40.

The spelling of 100711329781 in words is "one hundred billion, seven hundred eleven million, three hundred twenty-nine thousand, seven hundred eighty-one".