40021231231 has 8 divisors (see below), whose sum is σ = 41373486000. Its totient is φ = 38686887360.

The previous prime is 40021231171. The next prime is 40021231279. The reversal of 40021231231 is 13213212004.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40021231231 is a prime.

It is a super-2 number, since 2×40021231231² (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 = 40021231199 and 40021231208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40021211231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4473181 + ... + 4482118.

It is an arithmetic number, because the mean of its divisors is an integer number (5171685750).

Almost surely, 2^40021231231 is an apocalyptic number.

40021231231 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

40021231231 is a deficient number, since it is larger than the sum of its proper divisors (1352254769).

40021231231 is a wasteful number, since it uses less digits than its factorization.

40021231231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8955449.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 40021231231 its reverse (13213212004), we get a palindrome (53234443235).

The spelling of 40021231231 in words is "forty billion, twenty-one million, two hundred thirty-one thousand, two hundred thirty-one".