121111223130 has 96 divisors (see below), whose sum is σ = 319225795200. Its totient is φ = 31854197376.

The previous prime is 121111223113. The next prime is 121111223153. The reversal of 121111223130 is 31322111121.

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 47 ways as a sum of consecutive naturals, for example, 2177811 + ... + 2232729.

It is an arithmetic number, because the mean of its divisors is an integer number (3325268700).

Almost surely, 2^121111223130 is an apocalyptic number.

121111223130 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 121111223130, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (159612897600).

121111223130 is an abundant number, since it is smaller than the sum of its proper divisors (198114572070).

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

121111223130 is a wasteful number, since it uses less digits than its factorization.

121111223130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55268 (or 55265 counting only the distinct ones).

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

Adding to 121111223130 its reverse (31322111121), we get a palindrome (152433334251).

The spelling of 121111223130 in words is "one hundred twenty-one billion, one hundred eleven million, two hundred twenty-three thousand, one hundred thirty".