992198121 has 8 divisors (see below), whose sum is σ = 1365606144. Its totient is φ = 640127760.

The previous prime is 992198111. The next prime is 992198143. The reversal of 992198121 is 121891299.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 992198121 - 2⁵ = 992198089 is a prime.

It is a super-2 number, since 2×992198121² = 1968914222631861282, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (992198111) 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 7 ways as a sum of consecutive naturals, for example, 5334306 + ... + 5334491.

It is an arithmetic number, because the mean of its divisors is an integer number (170700768).

Almost surely, 2^992198121 is an apocalyptic number.

It is an amenable number.

992198121 is a deficient number, since it is larger than the sum of its proper divisors (373408023).

992198121 is a wasteful number, since it uses less digits than its factorization.

992198121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10668831.

The product of its digits is 23328, while the sum is 42.

The square root of 992198121 is about 31499.1765130455. The cubic root of 992198121 is about 997.3925809415.

The spelling of 992198121 in words is "nine hundred ninety-two million, one hundred ninety-eight thousand, one hundred twenty-one".