992278229921 has 4 divisors (see below), whose sum is σ = 1082485341744. Its totient is φ = 902071118100.

The previous prime is 992278229879. The next prime is 992278229933. The reversal of 992278229921 is 129922872299.

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.

It is a cyclic number.

It is not a de Polignac number, because 992278229921 - 2¹⁰ = 992278228897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (992278226921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45103555895 + ... + 45103555916.

It is an arithmetic number, because the mean of its divisors is an integer number (270621335436).

Almost surely, 2^992278229921 is an apocalyptic number.

It is an amenable number.

992278229921 is a deficient number, since it is larger than the sum of its proper divisors (90207111823).

992278229921 is a wasteful number, since it uses less digits than its factorization.

992278229921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90207111822.

The product of its digits is 11757312, while the sum is 62.

The spelling of 992278229921 in words is "nine hundred ninety-two billion, two hundred seventy-eight million, two hundred twenty-nine thousand, nine hundred twenty-one".