121897182194 has 32 divisors (see below), whose sum is σ = 195810788016. Its totient is φ = 56710451200.

The previous prime is 121897182139. The next prime is 121897182217. The reversal of 121897182194 is 491281798121.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 118276151569 + 3621030625 = 343913^2 + 60175^2 .

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 2298602 + ... + 2351034.

Almost surely, 2^121897182194 is an apocalyptic number.

121897182194 is a deficient number, since it is larger than the sum of its proper divisors (73913605822).

121897182194 is a wasteful number, since it uses less digits than its factorization.

121897182194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53230.

The product of its digits is 580608, while the sum is 53.

The spelling of 121897182194 in words is "one hundred twenty-one billion, eight hundred ninety-seven million, one hundred eighty-two thousand, one hundred ninety-four".