121121220123312 has 20 divisors (see below), whose sum is σ = 312896485318680. Its totient is φ = 40373740041088.

The previous prime is 121121220123307. The next prime is 121121220123361. The reversal of 121121220123312 is 213321022121121.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1261679376237 + ... + 1261679376332.

It is an arithmetic number, because the mean of its divisors is an integer number (15644824265934).

Almost surely, 2^{121121220123312} is an apocalyptic number.

121121220123312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121121220123312 is an abundant number, since it is smaller than the sum of its proper divisors (191775265195368).

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

121121220123312 is a wasteful number, since it uses less digits than its factorization.

121121220123312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2523358752580 (or 2523358752574 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 24.

Adding to 121121220123312 its reverse (213321022121121), we get a palindrome (334442242244433).

The spelling of 121121220123312 in words is "one hundred twenty-one trillion, one hundred twenty-one billion, two hundred twenty million, one hundred twenty-three thousand, three hundred twelve".