40021101 has 8 divisors (see below), whose sum is σ = 59290560. Its totient is φ = 26680716.

The previous prime is 40021061. The next prime is 40021117. The reversal of 40021101 is 10112004.

It is a happy number.

40021101 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 40021101 - 2¹⁹ = 39496813 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40021151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 741105 + ... + 741158.

It is an arithmetic number, because the mean of its divisors is an integer number (7411320).

Almost surely, 2^40021101 is an apocalyptic number.

It is an amenable number.

40021101 is a deficient number, since it is larger than the sum of its proper divisors (19269459).

40021101 is a wasteful number, since it uses less digits than its factorization.

40021101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1482272 (or 1482266 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 40021101 is about 6326.2232809157. The cubic root of 40021101 is about 342.0553157679.

Adding to 40021101 its reverse (10112004), we get a palindrome (50133105).

The spelling of 40021101 in words is "forty million, twenty-one thousand, one hundred one".