121121121111000 has 128 divisors (see below), whose sum is σ = 377976655143360. Its totient is φ = 32292234240000.

The previous prime is 121121121110947. The next prime is 121121121111047. The reversal of 121121121111000 is 111121121121.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10198282 + ... + 18607718.

Almost surely, 2^{121121121111000} is an apocalyptic number.

121121121111000 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 121121121111000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (188988327571680).

121121121111000 is an abundant number, since it is smaller than the sum of its proper divisors (256855534032360).

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

121121121111000 is a wasteful number, since it uses less digits than its factorization.

121121121111000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8414262 (or 8414248 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 121121121111000 its reverse (111121121121), we get a palindrome (121232242232121).

It can be divided in two parts, 121121121 and 111000, that added together give a palindrome (121232121).

The spelling of 121121121111000 in words is "one hundred twenty-one trillion, one hundred twenty-one billion, one hundred twenty-one million, one hundred eleven thousand".