40101001001001 has 24 divisors (see below), whose sum is σ = 57945133733760. Its totient is φ = 26724095336736.

The previous prime is 40101001000979. The next prime is 40101001001011. The reversal of 40101001001001 is 10010010010104.

It is not a de Polignac number, because 40101001001001 - 2⁷ = 40101001000873 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

40101001001001 is a modest number, since divided by 1001001 gives 40101 as remainder.

It is not an unprimeable number, because it can be changed into a prime (40101001001011) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 275613210 + ... + 275758668.

It is an arithmetic number, because the mean of its divisors is an integer number (2414380572240).

Almost surely, 2^{40101001001001} is an apocalyptic number.

It is an amenable number.

40101001001001 is a deficient number, since it is larger than the sum of its proper divisors (17844132732759).

40101001001001 is a wasteful number, since it uses less digits than its factorization.

40101001001001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156605 (or 156602 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 40101001001001 its reverse (10010010010104), we get a palindrome (50111011011105).

The spelling of 40101001001001 in words is "forty trillion, one hundred one billion, one million, one thousand, one".