4140403042121 has 4 divisors (see below), whose sum is σ = 4149965174292. Its totient is φ = 4130840909952.

The previous prime is 4140403042117. The next prime is 4140403042129. The reversal of 4140403042121 is 1212403040414.

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 1930601870521 + 2209801171600 = 1389461^2 + 1486540^2 .

It is a cyclic number.

It is not a de Polignac number, because 4140403042121 - 2² = 4140403042117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4140403042129) 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, 4781065436 + ... + 4781066301.

It is an arithmetic number, because the mean of its divisors is an integer number (1037491293573).

Almost surely, 2^{4140403042121} is an apocalyptic number.

It is an amenable number.

4140403042121 is a deficient number, since it is larger than the sum of its proper divisors (9562132171).

4140403042121 is an equidigital number, since it uses as much as digits as its factorization.

4140403042121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9562132170.

The product of its (nonzero) digits is 3072, while the sum is 26.

Adding to 4140403042121 its reverse (1212403040414), we get a palindrome (5352806082535).

The spelling of 4140403042121 in words is "four trillion, one hundred forty billion, four hundred three million, forty-two thousand, one hundred twenty-one".