121000012198 has 16 divisors (see below), whose sum is σ = 195472879056. Its totient is φ = 55842924960.

The previous prime is 121000012193. The next prime is 121000012201. The reversal of 121000012198 is 891210000121.

121000012198 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×121000012198² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121000012193) 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 7 ways as a sum of consecutive naturals, for example, 356565 + ... + 607567.

It is an arithmetic number, because the mean of its divisors is an integer number (12217054941).

Almost surely, 2^121000012198 is an apocalyptic number.

121000012198 is a deficient number, since it is larger than the sum of its proper divisors (74472866858).

121000012198 is a wasteful number, since it uses less digits than its factorization.

121000012198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269559.

The product of its (nonzero) digits is 288, while the sum is 25.

The spelling of 121000012198 in words is "one hundred twenty-one billion, twelve thousand, one hundred ninety-eight".