121351420424 has 32 divisors (see below), whose sum is σ = 249189696000. Its totient is φ = 55059051072.

The previous prime is 121351420369. The next prime is 121351420429. The reversal of 121351420424 is 424024153121.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (121351420429) 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, 9882344 + ... + 9894615.

It is an arithmetic number, because the mean of its divisors is an integer number (7787178000).

Almost surely, 2^121351420424 is an apocalyptic number.

It is an amenable number.

121351420424 is an abundant number, since it is smaller than the sum of its proper divisors (127838275576).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121351420424 is a wasteful number, since it uses less digits than its factorization.

121351420424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19777037 (or 19777033 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 29.

Adding to 121351420424 its reverse (424024153121), we get a palindrome (545375573545).

The spelling of 121351420424 in words is "one hundred twenty-one billion, three hundred fifty-one million, four hundred twenty thousand, four hundred twenty-four".