121131212030312 has 16 divisors (see below), whose sum is σ = 247768388244000. Its totient is φ = 55059641831920.

The previous prime is 121131212030281. The next prime is 121131212030329. The reversal of 121131212030312 is 213030212131121.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 688245522812 + ... + 688245522987.

It is an arithmetic number, because the mean of its divisors is an integer number (15485524265250).

Almost surely, 2^{121131212030312} is an apocalyptic number.

It is an amenable number.

121131212030312 is an abundant number, since it is smaller than the sum of its proper divisors (126637176213688).

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

121131212030312 is a wasteful number, since it uses less digits than its factorization.

121131212030312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1376491045816 (or 1376491045812 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 121131212030312 its reverse (213030212131121), we get a palindrome (334161424161433).

The spelling of 121131212030312 in words is "one hundred twenty-one trillion, one hundred thirty-one billion, two hundred twelve million, thirty thousand, three hundred twelve".