121507662066447 has 8 divisors (see below), whose sum is σ = 162114806292400. Its totient is φ = 80952812942400.

The previous prime is 121507662066437. The next prime is 121507662066449. The reversal of 121507662066447 is 744660266705121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121507662066447 - 2⁷ = 121507662066319 is a prime.

It is a super-2 number, since 2×121507662066447² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121507662066449) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 13073770054 + ... + 13073779347.

It is an arithmetic number, because the mean of its divisors is an integer number (20264350786550).

Almost surely, 2^{121507662066447} is an apocalyptic number.

121507662066447 is a deficient number, since it is larger than the sum of its proper divisors (40607144225953).

121507662066447 is a wasteful number, since it uses less digits than its factorization.

121507662066447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26147550953.

The product of its (nonzero) digits is 20321280, while the sum is 57.

The spelling of 121507662066447 in words is "one hundred twenty-one trillion, five hundred seven billion, six hundred sixty-two million, sixty-six thousand, four hundred forty-seven".