40421340213021 has 12 divisors (see below), whose sum is σ = 58636965633948. Its totient is φ = 26831905376064.

The previous prime is 40421340213013. The next prime is 40421340213041. The reversal of 40421340213021 is 12031204312404.

40421340213021 is a `hidden beast` number, since 4 + 0 + 421 + 3 + 4 + 0 + 213 + 0 + 21 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 6839720861796 + 33581619351225 = 2615286^2 + 5794965^2 .

It is not a de Polignac number, because 40421340213021 - 2³ = 40421340213013 is a prime.

It is a super-3 number, since 3×40421340213021³ (a number of 42 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40421340213041) 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, 9637894950 + ... + 9637899143.

It is an arithmetic number, because the mean of its divisors is an integer number (4886413802829).

Almost surely, 2^{40421340213021} is an apocalyptic number.

It is an amenable number.

40421340213021 is a deficient number, since it is larger than the sum of its proper divisors (18215625420927).

40421340213021 is a wasteful number, since it uses less digits than its factorization.

40421340213021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19275794332 (or 19275794329 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 40421340213021 its reverse (12031204312404), we get a palindrome (52452544525425).

The spelling of 40421340213021 in words is "forty trillion, four hundred twenty-one billion, three hundred forty million, two hundred thirteen thousand, twenty-one".