12121122013320 has 128 divisors (see below), whose sum is σ = 36560471091840. Its totient is φ = 3214824837120.

The previous prime is 12121122013309. The next prime is 12121122013333. The reversal of 12121122013320 is 2331022112121.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16492080 + ... + 17211360.

It is an arithmetic number, because the mean of its divisors is an integer number (285628680405).

Almost surely, 2^{12121122013320} is an apocalyptic number.

12121122013320 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 12121122013320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18280235545920).

12121122013320 is an abundant number, since it is smaller than the sum of its proper divisors (24439349078520).

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

12121122013320 is a wasteful number, since it uses less digits than its factorization.

12121122013320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 720055 (or 720051 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 12121122013320 its reverse (2331022112121), we get a palindrome (14452144125441).

It can be divided in two parts, 121211 and 22013320, that added together give a triangular number (22134531 = T₆₆₅₃).

The spelling of 12121122013320 in words is "twelve trillion, one hundred twenty-one billion, one hundred twenty-two million, thirteen thousand, three hundred twenty".