121213331112120 has 128 divisors (see below), whose sum is σ = 392996090995200. Its totient is φ = 29731696003584.

The previous prime is 121213331112089. The next prime is 121213331112169. The reversal of 121213331112120 is 21211133312121.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 136839180 + ... + 137722139.

It is an arithmetic number, because the mean of its divisors is an integer number (3070281960900).

Almost surely, 2^{121213331112120} is an apocalyptic number.

121213331112120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121213331112120 is an abundant number, since it is smaller than the sum of its proper divisors (271782759883080).

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

121213331112120 is a wasteful number, since it uses less digits than its factorization.

121213331112120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274561629 (or 274561625 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 24.

Adding to 121213331112120 its reverse (21211133312121), we get a palindrome (142424464424241).

The spelling of 121213331112120 in words is "one hundred twenty-one trillion, two hundred thirteen billion, three hundred thirty-one million, one hundred twelve thousand, one hundred twenty".