121146447 has 4 divisors (see below), whose sum is σ = 161528600. Its totient is φ = 80764296.

The previous prime is 121146439. The next prime is 121146449. The reversal of 121146447 is 744641121.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 121146447 - 2³ = 121146439 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121146449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20191072 + ... + 20191077.

It is an arithmetic number, because the mean of its divisors is an integer number (40382150).

Almost surely, 2^121146447 is an apocalyptic number.

121146447 is a deficient number, since it is larger than the sum of its proper divisors (40382153).

121146447 is an equidigital number, since it uses as much as digits as its factorization.

121146447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40382152.

The product of its digits is 5376, while the sum is 30.

The square root of 121146447 is about 11006.6546688810. The cubic root of 121146447 is about 494.8082064846.

Adding to 121146447 its reverse (744641121), we get a palindrome (865787568).

The spelling of 121146447 in words is "one hundred twenty-one million, one hundred forty-six thousand, four hundred forty-seven".