40125020121 has 6 divisors (see below), whose sum is σ = 57958362410. Its totient is φ = 26750013408.

The previous prime is 40125020069. The next prime is 40125020141. The reversal of 40125020121 is 12102052104.

40125020121 is a `hidden beast` number, since 40 + 1 + 2 + 502 + 0 + 121 = 666.

It can be written as a sum of positive squares in only one way, i.e., 26948505600 + 13176514521 = 164160^2 + 114789^2 .

It is not a de Polignac number, because 40125020121 - 2²¹ = 40122922969 is a prime.

It is a super-2 number, since 2×40125020121² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40125020094 and 40125020103.

It is not an unprimeable number, because it can be changed into a prime (40125020141) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2229167776 + ... + 2229167793.

Almost surely, 2^40125020121 is an apocalyptic number.

It is an amenable number.

40125020121 is a deficient number, since it is larger than the sum of its proper divisors (17833342289).

40125020121 is a wasteful number, since it uses less digits than its factorization.

40125020121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4458335575 (or 4458335572 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

Adding to 40125020121 its reverse (12102052104), we get a palindrome (52227072225).

The spelling of 40125020121 in words is "forty billion, one hundred twenty-five million, twenty thousand, one hundred twenty-one".