121131132221320 has 64 divisors (see below), whose sum is σ = 301442755284720. Its totient is φ = 43516548117504.

The previous prime is 121131132221299. The next prime is 121131132221339. The reversal of 121131132221320 is 23122231131121.

It can be written as a sum of positive squares in 8 ways, for example, as 48991012412164 + 72140119809156 = 6999358^2 + 8493534^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3147879207 + ... + 3147917686.

Almost surely, 2^{121131132221320} is an apocalyptic number.

121131132221320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121131132221320 is an abundant number, since it is smaller than the sum of its proper divisors (180311623063400).

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

121131132221320 is a wasteful number, since it uses less digits than its factorization.

121131132221320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6295796954 (or 6295796950 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

Adding to 121131132221320 its reverse (23122231131121), we get a palindrome (144253363352441).

The spelling of 121131132221320 in words is "one hundred twenty-one trillion, one hundred thirty-one billion, one hundred thirty-two million, two hundred twenty-one thousand, three hundred twenty".