43312121045 has 12 divisors (see below), whose sum is σ = 53705233260. Its totient is φ = 33531960960.

The previous prime is 43312121033. The next prime is 43312121057. The reversal of 43312121045 is 54012121334.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (43312121033) and next prime (43312121057).

It can be written as a sum of positive squares in 2 ways, for example, as 16052129809 + 27259991236 = 126697^2 + 165106^2 .

It is not a de Polignac number, because 43312121045 - 2¹² = 43312116949 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4502180 + ... + 4511789.

It is an arithmetic number, because the mean of its divisors is an integer number (4475436105).

Almost surely, 2^43312121045 is an apocalyptic number.

It is an amenable number.

43312121045 is a deficient number, since it is larger than the sum of its proper divisors (10393112215).

43312121045 is an equidigital number, since it uses as much as digits as its factorization.

43312121045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9014036 (or 9014005 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

Adding to 43312121045 its reverse (54012121334), we get a palindrome (97324242379).

The spelling of 43312121045 in words is "forty-three billion, three hundred twelve million, one hundred twenty-one thousand, forty-five".