121230421135512 has 32 divisors (see below), whose sum is σ = 326389595365680. Its totient is φ = 37301668041600.

The previous prime is 121230421135339. The next prime is 121230421135513. The reversal of 121230421135512 is 215531124032121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121230421135513) 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, 194279520739 + ... + 194279521362.

Almost surely, 2^{121230421135512} is an apocalyptic number.

121230421135512 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121230421135512 is an abundant number, since it is smaller than the sum of its proper divisors (205159174230168).

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

121230421135512 is a wasteful number, since it uses less digits than its factorization.

121230421135512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388559042123 (or 388559042119 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 33.

Adding to 121230421135512 its reverse (215531124032121), we get a palindrome (336761545167633).

The spelling of 121230421135512 in words is "one hundred twenty-one trillion, two hundred thirty billion, four hundred twenty-one million, one hundred thirty-five thousand, five hundred twelve".