121121121020 has 96 divisors (see below), whose sum is σ = 266100145920. Its totient is φ = 46250265600.

The previous prime is 121121120999. The next prime is 121121121053. The reversal of 121121121020 is 20121121121.

121121121020 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 121121120986 and 121121121004.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 83358614 + ... + 83360066.

It is an arithmetic number, because the mean of its divisors is an integer number (2771876520).

Almost surely, 2^121121121020 is an apocalyptic number.

121121121020 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 121121121020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (133050072960).

121121121020 is an abundant number, since it is smaller than the sum of its proper divisors (144979024900).

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

121121121020 is a wasteful number, since it uses less digits than its factorization.

121121121020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3015 (or 3013 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 121121121020 its reverse (20121121121), we get a palindrome (141242242141).

The spelling of 121121121020 in words is "one hundred twenty-one billion, one hundred twenty-one million, one hundred twenty-one thousand, twenty".