121210313312 has 96 divisors (see below), whose sum is σ = 263684484000. Its totient is φ = 54388224000.

The previous prime is 121210313311. The next prime is 121210313347. The reversal of 121210313312 is 213313012121.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121210313311) 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, 12402764 + ... + 12412532.

It is an arithmetic number, because the mean of its divisors is an integer number (2746713375).

Almost surely, 2^121210313312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121210313312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (131842242000).

121210313312 is an abundant number, since it is smaller than the sum of its proper divisors (142474170688).

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

121210313312 is a wasteful number, since it uses less digits than its factorization.

121210313312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10240 (or 10232 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 121210313312 its reverse (213313012121), we get a palindrome (334523325433).

The spelling of 121210313312 in words is "one hundred twenty-one billion, two hundred ten million, three hundred thirteen thousand, three hundred twelve".