43251003121 has 2 divisors, whose sum is σ = 43251003122. Its totient is φ = 43251003120.

The previous prime is 43251003041. The next prime is 43251003149. The reversal of 43251003121 is 12130015234.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32551376400 + 10699626721 = 180420^2 + 103439^2 .

It is a cyclic number.

It is not a de Polignac number, because 43251003121 - 2¹³ = 43250994929 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 43251003092 and 43251003101.

It is not a weakly prime, because it can be changed into another prime (43251003721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21625501560 + 21625501561.

It is an arithmetic number, because the mean of its divisors is an integer number (21625501561).

Almost surely, 2^43251003121 is an apocalyptic number.

It is an amenable number.

43251003121 is a deficient number, since it is larger than the sum of its proper divisors (1).

43251003121 is an equidigital number, since it uses as much as digits as its factorization.

43251003121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 22.

Adding to 43251003121 its reverse (12130015234), we get a palindrome (55381018355).

The spelling of 43251003121 in words is "forty-three billion, two hundred fifty-one million, three thousand, one hundred twenty-one".