10198778122 has 16 divisors (see below), whose sum is σ = 16476694920. Its totient is φ = 4706629632.

The previous prime is 10198778111. The next prime is 10198778129. The reversal of 10198778122 is 22187789101.

It is a Cunningham number, because it is equal to 100989²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 5094961641 + 5103816481 = 71379^2 + 71441^2 .

It is not an unprimeable number, because it can be changed into a prime (10198778129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 363178 + ... + 390250.

Almost surely, 2^10198778122 is an apocalyptic number.

10198778122 is a deficient number, since it is larger than the sum of its proper divisors (6277916798).

10198778122 is a wasteful number, since it uses less digits than its factorization.

10198778122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41577.

The product of its (nonzero) digits is 112896, while the sum is 46.

The spelling of 10198778122 in words is "ten billion, one hundred ninety-eight million, seven hundred seventy-eight thousand, one hundred twenty-two".