121111011020320 has 48 divisors (see below), whose sum is σ = 286125754864320. Its totient is φ = 48444236564224.

The previous prime is 121111011020299. The next prime is 121111011020327. The reversal of 121111011020320 is 23020110111121.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 121111011020294 and 121111011020303.

It is not an unprimeable number, because it can be changed into a prime (121111011020327) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51686301 + ... + 53978659.

It is an arithmetic number, because the mean of its divisors is an integer number (5960953226340).

Almost surely, 2^{121111011020320} is an apocalyptic number.

121111011020320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121111011020320 is an abundant number, since it is smaller than the sum of its proper divisors (165014743844000).

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

121111011020320 is a wasteful number, since it uses less digits than its factorization.

121111011020320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2622577 (or 2622569 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 121111011020320 its reverse (23020110111121), we get a palindrome (144131121131441).

The spelling of 121111011020320 in words is "one hundred twenty-one trillion, one hundred eleven billion, eleven million, twenty thousand, three hundred twenty".