121220243164 has 6 divisors (see below), whose sum is σ = 212135425544. Its totient is φ = 60610121580.

The previous prime is 121220243083. The next prime is 121220243167. The reversal of 121220243164 is 461342022121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121220243167) by changing a digit.

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 as a sum of consecutive naturals, namely, 15152530392 + ... + 15152530399.

Almost surely, 2^121220243164 is an apocalyptic number.

It is an amenable number.

121220243164 is a deficient number, since it is larger than the sum of its proper divisors (90915182380).

121220243164 is a wasteful number, since it uses less digits than its factorization.

121220243164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30305060795 (or 30305060793 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

Adding to 121220243164 its reverse (461342022121), we get a palindrome (582562265285).

The spelling of 121220243164 in words is "one hundred twenty-one billion, two hundred twenty million, two hundred forty-three thousand, one hundred sixty-four".