121425253554 has 32 divisors (see below), whose sum is σ = 268281354240. Its totient is φ = 36329763600.

The previous prime is 121425253549. The next prime is 121425253583. The reversal of 121425253554 is 455352524121.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11638942 + ... + 11649369.

It is an arithmetic number, because the mean of its divisors is an integer number (8383792320).

Almost surely, 2^121425253554 is an apocalyptic number.

121425253554 is an abundant number, since it is smaller than the sum of its proper divisors (146856100686).

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

121425253554 is a wasteful number, since it uses less digits than its factorization.

121425253554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23288406.

The product of its digits is 240000, while the sum is 39.

Adding to 121425253554 its reverse (455352524121), we get a palindrome (576777777675).

The spelling of 121425253554 in words is "one hundred twenty-one billion, four hundred twenty-five million, two hundred fifty-three thousand, five hundred fifty-four".