40120101 has 24 divisors (see below), whose sum is σ = 66416064. Its totient is φ = 22861440.

The previous prime is 40120081. The next prime is 40120109. The reversal of 40120101 is 10102104.

It is a happy number.

It is not a de Polignac number, because 40120101 - 2⁷ = 40119973 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 (40120109) 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, 30285 + ... + 31581.

It is an arithmetic number, because the mean of its divisors is an integer number (2767336).

Almost surely, 2^40120101 is an apocalyptic number.

It is an amenable number.

40120101 is a deficient number, since it is larger than the sum of its proper divisors (26295963).

40120101 is a wasteful number, since it uses less digits than its factorization.

40120101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1801 (or 1798 counting only the distinct ones).

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

The square root of 40120101 is about 6334.0430216411. The cubic root of 40120101 is about 342.3371303698.

Adding to 40120101 its reverse (10102104), we get a palindrome (50222205).

It can be divided in two parts, 401 and 20101, that added together give a palindrome (20502).

The spelling of 40120101 in words is "forty million, one hundred twenty thousand, one hundred one".