198050121 has 6 divisors (see below), whose sum is σ = 286072410. Its totient is φ = 132033408.

The previous prime is 198050117. The next prime is 198050161. The reversal of 198050121 is 121050891.

It can be written as a sum of positive squares in only one way, i.e., 183304521 + 14745600 = 13539^2 + 3840^2 .

It is not a de Polignac number, because 198050121 - 2² = 198050117 is a prime.

It is a super-2 number, since 2×198050121² = 78447700856229282, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (198050101) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11002776 + ... + 11002793.

It is an arithmetic number, because the mean of its divisors is an integer number (47678735).

Almost surely, 2^198050121 is an apocalyptic number.

It is an amenable number.

198050121 is a deficient number, since it is larger than the sum of its proper divisors (88022289).

198050121 is a wasteful number, since it uses less digits than its factorization.

198050121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22005575 (or 22005572 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 27.

The square root of 198050121 is about 14073.0281389614. The cubic root of 198050121 is about 582.8968441558.

The spelling of 198050121 in words is "one hundred ninety-eight million, fifty thousand, one hundred twenty-one".