121560622100 has 18 divisors (see below), whose sum is σ = 263786550174. Its totient is φ = 48624248800.

The previous prime is 121560622087. The next prime is 121560622111. The reversal of 121560622100 is 1226065121.

It can be written as a sum of positive squares in 3 ways, for example, as 2520441616 + 119040180484 = 50204^2 + 345022^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 121560622100.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 607803011 + ... + 607803210.

It is an arithmetic number, because the mean of its divisors is an integer number (14654808343).

Almost surely, 2^121560622100 is an apocalyptic number.

121560622100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121560622100 is an abundant number, since it is smaller than the sum of its proper divisors (142225928074).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121560622100 is a wasteful number, since it uses less digits than its factorization.

121560622100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1215606235 (or 1215606228 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 26.

Adding to 121560622100 its reverse (1226065121), we get a palindrome (122786687221).

The spelling of 121560622100 in words is "one hundred twenty-one billion, five hundred sixty million, six hundred twenty-two thousand, one hundred".