10131721093 has 4 divisors (see below), whose sum is σ = 10911084268. Its totient is φ = 9352357920.

The previous prime is 10131721091. The next prime is 10131721111. The reversal of 10131721093 is 39012713101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 39012713101 = 29 ⋅1345265969.

It can be written as a sum of positive squares in 2 ways, for example, as 3554186689 + 6577534404 = 59617^2 + 81102^2 .

It is a cyclic number.

It is not a de Polignac number, because 10131721093 - 2¹ = 10131721091 is a prime.

It is a super-2 number, since 2×10131721093² (a number of 21 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 (10131721091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 389681568 + ... + 389681593.

It is an arithmetic number, because the mean of its divisors is an integer number (2727771067).

Almost surely, 2^10131721093 is an apocalyptic number.

10131721093 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

10131721093 is a deficient number, since it is larger than the sum of its proper divisors (779363175).

10131721093 is an equidigital number, since it uses as much as digits as its factorization.

10131721093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 779363174.

The product of its (nonzero) digits is 1134, while the sum is 28.

The spelling of 10131721093 in words is "ten billion, one hundred thirty-one million, seven hundred twenty-one thousand, ninety-three".