20121111021120 has 112 divisors (see below), whose sum is σ = 63900427472448. Its totient is φ = 5364294174720.

The previous prime is 20121111021091. The next prime is 20121111021197. The reversal of 20121111021120 is 2112011112102.

It is a happy number.

20121111021120 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

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

It is a self number, because there is not a number n which added to its sum of digits gives 20121111021120.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1253907 + ... + 6466413.

It is an arithmetic number, because the mean of its divisors is an integer number (570539531004).

Almost surely, 2^{20121111021120} is an apocalyptic number.

20121111021120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20121111021120 is an abundant number, since it is smaller than the sum of its proper divisors (43779316451328).

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

20121111021120 is a wasteful number, since it uses less digits than its factorization.

20121111021120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5216548 (or 5216538 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 20121111021120 its reverse (2112011112102), we get a palindrome (22233122133222).

The spelling of 20121111021120 in words is "twenty trillion, one hundred twenty-one billion, one hundred eleven million, twenty-one thousand, one hundred twenty".