43042121355 has 16 divisors (see below), whose sum is σ = 68923733760. Its totient is φ = 22937018208.

The previous prime is 43042121351. The next prime is 43042121357. The reversal of 43042121355 is 55312124034.

It is not a de Polignac number, because 43042121355 - 2² = 43042121351 is a prime.

It is not an unprimeable number, because it can be changed into a prime (43042121351) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1154785 + ... + 1191474.

It is an arithmetic number, because the mean of its divisors is an integer number (4307733360).

Almost surely, 2^43042121355 is an apocalyptic number.

43042121355 is a deficient number, since it is larger than the sum of its proper divisors (25881612405).

43042121355 is a wasteful number, since it uses less digits than its factorization.

43042121355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2347490.

The product of its (nonzero) digits is 14400, while the sum is 30.

Adding to 43042121355 its reverse (55312124034), we get a palindrome (98354245389).

The spelling of 43042121355 in words is "forty-three billion, forty-two million, one hundred twenty-one thousand, three hundred fifty-five".