121113344102520 has 384 divisors, whose sum is σ = 460021111603200. Its totient is φ = 24968245800960.

The previous prime is 121113344102489. The next prime is 121113344102561. The reversal of 121113344102520 is 25201443311121.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 8216976 + ... + 17599584.

It is an arithmetic number, because the mean of its divisors is an integer number (1197971644800).

Almost surely, 2^{121113344102520} is an apocalyptic number.

121113344102520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121113344102520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (230010555801600).

121113344102520 is an abundant number, since it is smaller than the sum of its proper divisors (338907767500680).

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

121113344102520 is a wasteful number, since it uses less digits than its factorization.

121113344102520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9382779 (or 9382764 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 30.

Adding to 121113344102520 its reverse (25201443311121), we get a palindrome (146314787413641).

The spelling of 121113344102520 in words is "one hundred twenty-one trillion, one hundred thirteen billion, three hundred forty-four million, one hundred two thousand, five hundred twenty".