121213633116 has 24 divisors (see below), whose sum is σ = 289730148624. Its totient is φ = 39419067520.

The previous prime is 121213633111. The next prime is 121213633117. The reversal of 121213633116 is 611336312121.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121213633111) 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, 123184095 + ... + 123185078.

It is an arithmetic number, because the mean of its divisors is an integer number (12072089526).

Almost surely, 2^121213633116 is an apocalyptic number.

It is an amenable number.

121213633116 is an abundant number, since it is smaller than the sum of its proper divisors (168516515508).

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

121213633116 is a wasteful number, since it uses less digits than its factorization.

121213633116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246369221 (or 246369219 counting only the distinct ones).

The product of its digits is 3888, while the sum is 30.

Adding to 121213633116 its reverse (611336312121), we get a palindrome (732549945237).

The spelling of 121213633116 in words is "one hundred twenty-one billion, two hundred thirteen million, six hundred thirty-three thousand, one hundred sixteen".