43748401121 has 2 divisors, whose sum is σ = 43748401122. Its totient is φ = 43748401120.

The previous prime is 43748401117. The next prime is 43748401127. The reversal of 43748401121 is 12110484734.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33173158225 + 10575242896 = 182135^2 + 102836^2 .

It is a cyclic number.

It is not a de Polignac number, because 43748401121 - 2² = 43748401117 is a prime.

It is not a weakly prime, because it can be changed into another prime (43748401127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21874200560 + 21874200561.

It is an arithmetic number, because the mean of its divisors is an integer number (21874200561).

Almost surely, 2^43748401121 is an apocalyptic number.

It is an amenable number.

43748401121 is a deficient number, since it is larger than the sum of its proper divisors (1).

43748401121 is an equidigital number, since it uses as much as digits as its factorization.

43748401121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21504, while the sum is 35.

Adding to 43748401121 its reverse (12110484734), we get a palindrome (55858885855).

The spelling of 43748401121 in words is "forty-three billion, seven hundred forty-eight million, four hundred one thousand, one hundred twenty-one".