121668449 has 8 divisors (see below), whose sum is σ = 141125568. Its totient is φ = 102730320.

The previous prime is 121668433. The next prime is 121668451. The reversal of 121668449 is 944866121.

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

It is not a de Polignac number, because 121668449 - 2⁴ = 121668433 is a prime.

It is a super-2 number, since 2×121668449² = 29606422964131202, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121668049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129242 + ... + 130179.

It is an arithmetic number, because the mean of its divisors is an integer number (17640696).

Almost surely, 2^121668449 is an apocalyptic number.

It is an amenable number.

121668449 is a deficient number, since it is larger than the sum of its proper divisors (19457119).

121668449 is an equidigital number, since it uses as much as digits as its factorization.

121668449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259495.

The product of its digits is 82944, while the sum is 41.

The square root of 121668449 is about 11030.3421977743. The cubic root of 121668449 is about 495.5178731356.

The spelling of 121668449 in words is "one hundred twenty-one million, six hundred sixty-eight thousand, four hundred forty-nine".