40103131021 has 8 divisors (see below), whose sum is σ = 40343660280. Its totient is φ = 39862975488.

The previous prime is 40103130989. The next prime is 40103131051. The reversal of 40103131021 is 12013130104.

It can be written as a sum of positive squares in 4 ways, for example, as 8577352996 + 31525778025 = 92614^2 + 177555^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 40103131021 - 2⁵ = 40103130989 is a prime.

It is a super-2 number, since 2×40103131021² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40103130986 and 40103131004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40103131051) 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 7 ways as a sum of consecutive naturals, for example, 123325 + ... + 308893.

It is an arithmetic number, because the mean of its divisors is an integer number (5042957535).

Almost surely, 2^40103131021 is an apocalyptic number.

It is an amenable number.

40103131021 is a deficient number, since it is larger than the sum of its proper divisors (240529259).

40103131021 is a wasteful number, since it uses less digits than its factorization.

40103131021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186863.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 40103131021 its reverse (12013130104), we get a palindrome (52116261125).

The spelling of 40103131021 in words is "forty billion, one hundred three million, one hundred thirty-one thousand, twenty-one".