155442002112321 has 16 divisors (see below), whose sum is σ = 216267988245120. Its totient is φ = 99122044313600.

The previous prime is 155442002112307. The next prime is 155442002112349. The reversal of 155442002112321 is 123211200244551.

It is a cyclic number.

It is not a de Polignac number, because 155442002112321 - 2²⁶ = 155441935003457 is a prime.

It is not an unprimeable number, because it can be changed into a prime (155442002117321) 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, 13659871 + ... + 22304171.

It is an arithmetic number, because the mean of its divisors is an integer number (13516749265320).

Almost surely, 2^{155442002112321} is an apocalyptic number.

It is an amenable number.

155442002112321 is a deficient number, since it is larger than the sum of its proper divisors (60825986132799).

155442002112321 is a wasteful number, since it uses less digits than its factorization.

155442002112321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8904936.

The product of its (nonzero) digits is 19200, while the sum is 33.

Adding to 155442002112321 its reverse (123211200244551), we get a palindrome (278653202356872).

The spelling of 155442002112321 in words is "one hundred fifty-five trillion, four hundred forty-two billion, two million, one hundred twelve thousand, three hundred twenty-one".