121011121320 has 64 divisors (see below), whose sum is σ = 364272491520. Its totient is φ = 32159487744.

The previous prime is 121011121307. The next prime is 121011121321. The reversal of 121011121320 is 23121110121.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 121011121320.

It is not an unprimeable number, because it can be changed into a prime (121011121321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1685704 + ... + 1756023.

It is an arithmetic number, because the mean of its divisors is an integer number (5691757680).

Almost surely, 2^121011121320 is an apocalyptic number.

121011121320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121011121320 is an abundant number, since it is smaller than the sum of its proper divisors (243261370200).

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

121011121320 is a wasteful number, since it uses less digits than its factorization.

121011121320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3442034 (or 3442030 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 121011121320 its reverse (23121110121), we get a palindrome (144132231441).

The spelling of 121011121320 in words is "one hundred twenty-one billion, eleven million, one hundred twenty-one thousand, three hundred twenty".