40130025121 has 4 divisors (see below), whose sum is σ = 42490614852. Its totient is φ = 37769435392.

The previous prime is 40130025049. The next prime is 40130025137. The reversal of 40130025121 is 12152003104.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 20897882721 + 19232142400 = 144561^2 + 138680^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40130025121 is a prime.

It is a super-2 number, since 2×40130025121² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40130025421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1180294840 + ... + 1180294873.

It is an arithmetic number, because the mean of its divisors is an integer number (10622653713).

Almost surely, 2^40130025121 is an apocalyptic number.

It is an amenable number.

40130025121 is a deficient number, since it is larger than the sum of its proper divisors (2360589731).

40130025121 is a wasteful number, since it uses less digits than its factorization.

40130025121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2360589730.

The product of its (nonzero) digits is 240, while the sum is 19.

Adding to 40130025121 its reverse (12152003104), we get a palindrome (52282028225).

The spelling of 40130025121 in words is "forty billion, one hundred thirty million, twenty-five thousand, one hundred twenty-one".