121121123130 has 192 divisors, whose sum is σ = 367507445760. Its totient is φ = 27102187008.

The previous prime is 121121123089. The next prime is 121121123159. The reversal of 121121123130 is 31321121121.

It is a Harshad number since it is a multiple of its sum of digits (18).

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 95 ways as a sum of consecutive naturals, for example, 15990024 + ... + 15997596.

It is an arithmetic number, because the mean of its divisors is an integer number (1914101280).

Almost surely, 2^121121123130 is an apocalyptic number.

121121123130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 121121123130, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (183753722880).

121121123130 is an abundant number, since it is smaller than the sum of its proper divisors (246386322630).

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

121121123130 is a wasteful number, since it uses less digits than its factorization.

121121123130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8125 (or 8122 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 121121123130 its reverse (31321121121), we get a palindrome (152442244251).

The spelling of 121121123130 in words is "one hundred twenty-one billion, one hundred twenty-one million, one hundred twenty-three thousand, one hundred thirty".