121431221446 has 4 divisors (see below), whose sum is σ = 182146832172. Its totient is φ = 60715610722.

The previous prime is 121431221393. The next prime is 121431221449. The reversal of 121431221446 is 644122134121.

It is a happy number.

121431221446 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121431221449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30357805360 + ... + 30357805363.

It is an arithmetic number, because the mean of its divisors is an integer number (45536708043).

Almost surely, 2^121431221446 is an apocalyptic number.

121431221446 is a deficient number, since it is larger than the sum of its proper divisors (60715610726).

121431221446 is an equidigital number, since it uses as much as digits as its factorization.

121431221446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60715610725.

The product of its digits is 9216, while the sum is 31.

Adding to 121431221446 its reverse (644122134121), we get a palindrome (765553355567).

The spelling of 121431221446 in words is "one hundred twenty-one billion, four hundred thirty-one million, two hundred twenty-one thousand, four hundred forty-six".