121304016312 has 64 divisors (see below), whose sum is σ = 309776659200. Its totient is φ = 39574106880.

The previous prime is 121304016289. The next prime is 121304016313. The reversal of 121304016312 is 213610403121.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121304016313) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26362 + ... + 493257.

It is an arithmetic number, because the mean of its divisors is an integer number (4840260300).

Almost surely, 2^121304016312 is an apocalyptic number.

121304016312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121304016312 is an abundant number, since it is smaller than the sum of its proper divisors (188472642888).

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

121304016312 is a wasteful number, since it uses less digits than its factorization.

121304016312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 519836 (or 519832 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 121304016312 its reverse (213610403121), we get a palindrome (334914419433).

The spelling of 121304016312 in words is "one hundred twenty-one billion, three hundred four million, sixteen thousand, three hundred twelve".