1240025004121 has 4 divisors (see below), whose sum is σ = 1240035128244. Its totient is φ = 1240014880000.

The previous prime is 1240025004103. The next prime is 1240025004149. The reversal of 1240025004121 is 1214005200421.

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 438991054096 + 801033950025 = 662564^2 + 895005^2 .

It is a cyclic number.

It is not a de Polignac number, because 1240025004121 - 2²⁹ = 1239488133209 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1240025004092 and 1240025004101.

It is not an unprimeable number, because it can be changed into a prime (1240025004521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4876060 + ... + 5124061.

It is an arithmetic number, because the mean of its divisors is an integer number (310008782061).

Almost surely, 2^{1240025004121} is an apocalyptic number.

It is an amenable number.

1240025004121 is a deficient number, since it is larger than the sum of its proper divisors (10124123).

1240025004121 is a wasteful number, since it uses less digits than its factorization.

1240025004121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10124122.

The product of its (nonzero) digits is 640, while the sum is 22.

The spelling of 1240025004121 in words is "one trillion, two hundred forty billion, twenty-five million, four thousand, one hundred twenty-one".