121751602004 has 6 divisors (see below), whose sum is σ = 213065303514. Its totient is φ = 60875801000.

The previous prime is 121751601971. The next prime is 121751602013. The reversal of 121751602004 is 400206157121.

It can be written as a sum of positive squares in only one way, i.e., 83434322500 + 38317279504 = 288850^2 + 195748^2 .

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 as a sum of consecutive naturals, namely, 15218950247 + ... + 15218950254.

It is an arithmetic number, because the mean of its divisors is an integer number (35510883919).

Almost surely, 2^121751602004 is an apocalyptic number.

It is an amenable number.

121751602004 is a deficient number, since it is larger than the sum of its proper divisors (91313701510).

121751602004 is a wasteful number, since it uses less digits than its factorization.

121751602004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30437900505 (or 30437900503 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 29.

Adding to 121751602004 its reverse (400206157121), we get a palindrome (521957759125).

The spelling of 121751602004 in words is "one hundred twenty-one billion, seven hundred fifty-one million, six hundred two thousand, four".