121501443406 has 48 divisors (see below), whose sum is σ = 213203128320. Its totient is φ = 51778969200.

The previous prime is 121501443403. The next prime is 121501443407. The reversal of 121501443406 is 604344105121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121501443403) 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 23 ways as a sum of consecutive naturals, for example, 22703631 + ... + 22708981.

It is an arithmetic number, because the mean of its divisors is an integer number (4441731840).

Almost surely, 2^121501443406 is an apocalyptic number.

121501443406 is a deficient number, since it is larger than the sum of its proper divisors (91701684914).

121501443406 is a wasteful number, since it uses less digits than its factorization.

121501443406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6629 (or 6622 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 31.

Adding to 121501443406 its reverse (604344105121), we get a palindrome (725845548527).

The spelling of 121501443406 in words is "one hundred twenty-one billion, five hundred one million, four hundred forty-three thousand, four hundred six".