40013241021 has 12 divisors (see below), whose sum is σ = 62242819548. Its totient is φ = 24623532864.

The previous prime is 40013241017. The next prime is 40013241049. The reversal of 40013241021 is 12014231004.

40013241021 is a `hidden beast` number, since 400 + 1 + 3 + 241 + 0 + 21 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1742144121 + 38271096900 = 41739^2 + 195630^2 .

It is not a de Polignac number, because 40013241021 - 2² = 40013241017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40013240985 and 40013241003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40013241091) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 170996640 + ... + 170996873.

It is an arithmetic number, because the mean of its divisors is an integer number (5186901629).

Almost surely, 2^40013241021 is an apocalyptic number.

It is an amenable number.

40013241021 is a deficient number, since it is larger than the sum of its proper divisors (22229578527).

40013241021 is a wasteful number, since it uses less digits than its factorization.

40013241021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341993532 (or 341993529 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 40013241021 its reverse (12014231004), we get a palindrome (52027472025).

The spelling of 40013241021 in words is "forty billion, thirteen million, two hundred forty-one thousand, twenty-one".