121320545512 has 8 divisors (see below), whose sum is σ = 227476022850. Its totient is φ = 60660272752.

The previous prime is 121320545503. The next prime is 121320545551. The reversal of 121320545512 is 215545023121.

It can be written as a sum of positive squares in only one way, i.e., 116618152036 + 4702393476 = 341494^2 + 68574^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

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, 7582534087 + ... + 7582534102.

Almost surely, 2^121320545512 is an apocalyptic number.

It is an amenable number.

121320545512 is a deficient number, since it is larger than the sum of its proper divisors (106155477338).

121320545512 is a wasteful number, since it uses less digits than its factorization.

121320545512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15165068195 (or 15165068191 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 31.

Adding to 121320545512 its reverse (215545023121), we get a palindrome (336865568633).

The spelling of 121320545512 in words is "one hundred twenty-one billion, three hundred twenty million, five hundred forty-five thousand, five hundred twelve".