919558080121 has 4 divisors (see below), whose sum is σ = 919562972544. Its totient is φ = 919553187700.

The previous prime is 919558080109. The next prime is 919558080149. The reversal of 919558080121 is 121080855919.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 121080855919 = 83 ⋅1458805493.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-919558080121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (919558080101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2152525 + ... + 2544106.

It is an arithmetic number, because the mean of its divisors is an integer number (229890743136).

Almost surely, 2^919558080121 is an apocalyptic number.

It is an amenable number.

919558080121 is a deficient number, since it is larger than the sum of its proper divisors (4892423).

919558080121 is a wasteful number, since it uses less digits than its factorization.

919558080121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4892422.

The product of its (nonzero) digits is 259200, while the sum is 49.

The spelling of 919558080121 in words is "nine hundred nineteen billion, five hundred fifty-eight million, eighty thousand, one hundred twenty-one".