121111341320 has 64 divisors (see below), whose sum is σ = 276723976320. Its totient is φ = 47694518784.

The previous prime is 121111341317. The next prime is 121111341349. The reversal of 121111341320 is 23143111121.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 121111341292 and 121111341301.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5115029 + ... + 5138651.

It is an arithmetic number, because the mean of its divisors is an integer number (4323812130).

Almost surely, 2^121111341320 is an apocalyptic number.

121111341320 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 121111341320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (138361988160).

121111341320 is an abundant number, since it is smaller than the sum of its proper divisors (155612635000).

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

121111341320 is a wasteful number, since it uses less digits than its factorization.

121111341320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25614 (or 25610 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 121111341320 its reverse (23143111121), we get a palindrome (144254452441).

The spelling of 121111341320 in words is "one hundred twenty-one billion, one hundred eleven million, three hundred forty-one thousand, three hundred twenty".