40020101001 has 20 divisors (see below), whose sum is σ = 59825122500. Its totient is φ = 26661319776.

The previous prime is 40020100999. The next prime is 40020101027. The reversal of 40020101001 is 10010102004.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2190240000 + 37829861001 = 46800^2 + 194499^2 .

It is not a de Polignac number, because 40020101001 - 2¹ = 40020100999 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (40020101101) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 57126 + ... + 288623.

It is an arithmetic number, because the mean of its divisors is an integer number (2991256125).

Almost surely, 2^40020101001 is an apocalyptic number.

It is an amenable number.

40020101001 is a deficient number, since it is larger than the sum of its proper divisors (19805021499).

40020101001 is a wasteful number, since it uses less digits than its factorization.

40020101001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347190 (or 347181 counting only the distinct ones).

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

Adding to 40020101001 its reverse (10010102004), we get a palindrome (50030203005).

The spelling of 40020101001 in words is "forty billion, twenty million, one hundred one thousand, one".