40210101 has 20 divisors (see below), whose sum is σ = 60252192. Its totient is φ = 26724168.

The previous prime is 40210091. The next prime is 40210103. The reversal of 40210101 is 10101204.

It is a happy number.

It is not a de Polignac number, because 40210101 - 2¹⁴ = 40193717 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 (40210103) 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, 37296 + ... + 38358.

Almost surely, 2^40210101 is an apocalyptic number.

It is an amenable number.

40210101 is a deficient number, since it is larger than the sum of its proper divisors (20042091).

40210101 is a wasteful number, since it uses less digits than its factorization.

40210101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1542 (or 1533 counting only the distinct ones).

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

The square root of 40210101 is about 6341.1435088634. The cubic root of 40210101 is about 342.5929234432.

Adding to 40210101 its reverse (10101204), we get a palindrome (50311305).

The spelling of 40210101 in words is "forty million, two hundred ten thousand, one hundred one".