40231221024 has 24 divisors (see below), whose sum is σ = 105606955440. Its totient is φ = 13410406976.

The previous prime is 40231221001. The next prime is 40231221031. The reversal of 40231221024 is 42012213204.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×40231221024² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 209537514 + ... + 209537705.

It is an arithmetic number, because the mean of its divisors is an integer number (4400289810).

Almost surely, 2^40231221024 is an apocalyptic number.

It is an amenable number.

40231221024 is an abundant number, since it is smaller than the sum of its proper divisors (65375734416).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40231221024 is a wasteful number, since it uses less digits than its factorization.

40231221024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 419075232 (or 419075224 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 40231221024 its reverse (42012213204), we get a palindrome (82243434228).

The spelling of 40231221024 in words is "forty billion, two hundred thirty-one million, two hundred twenty-one thousand, twenty-four".