42123301155 has 40 divisors (see below), whose sum is σ = 81318382992. Its totient is φ = 20737622592.

The previous prime is 42123301153. The next prime is 42123301159. The reversal of 42123301155 is 55110332124.

42123301155 is a `hidden beast` number, since 4 + 212 + 330 + 115 + 5 = 666.

It is not a de Polignac number, because 42123301155 - 2¹ = 42123301153 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (42123301153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 3995049 + ... + 4005578.

Almost surely, 2^42123301155 is an apocalyptic number.

42123301155 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

42123301155 is a deficient number, since it is larger than the sum of its proper divisors (39195081837).

42123301155 is a wasteful number, since it uses less digits than its factorization.

42123301155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8000657 (or 8000648 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

Adding to 42123301155 its reverse (55110332124), we get a palindrome (97233633279).

The spelling of 42123301155 in words is "forty-two billion, one hundred twenty-three million, three hundred one thousand, one hundred fifty-five".