121447490657 has 4 divisors (see below), whose sum is σ = 122910713520. Its totient is φ = 119984267796.

The previous prime is 121447490603. The next prime is 121447490669. The reversal of 121447490657 is 756094744121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 121447490657 - 2¹² = 121447486561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121447490687) 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 3 ways as a sum of consecutive naturals, for example, 731611307 + ... + 731611472.

It is an arithmetic number, because the mean of its divisors is an integer number (30727678380).

Almost surely, 2^121447490657 is an apocalyptic number.

It is an amenable number.

121447490657 is a deficient number, since it is larger than the sum of its proper divisors (1463222863).

121447490657 is an equidigital number, since it uses as much as digits as its factorization.

121447490657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1463222862.

The product of its (nonzero) digits is 1693440, while the sum is 50.

The spelling of 121447490657 in words is "one hundred twenty-one billion, four hundred forty-seven million, four hundred ninety thousand, six hundred fifty-seven".