1320021101124 has 240 divisors, whose sum is σ = 4134929863680. Its totient is φ = 362476762560.

The previous prime is 1320021101123. The next prime is 1320021101141. The reversal of 1320021101124 is 4211011200231.

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

It is a junction number, because it is equal to n+sod(n) for n = 1320021101097 and 1320021101106.

It is not an unprimeable number, because it can be changed into a prime (1320021101123) by changing a digit.

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 79 ways as a sum of consecutive naturals, for example, 1133697 + ... + 1981239.

It is an arithmetic number, because the mean of its divisors is an integer number (17228874432).

Almost surely, 2^{1320021101124} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1320021101124, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2067464931840).

1320021101124 is an abundant number, since it is smaller than the sum of its proper divisors (2814908762556).

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

1320021101124 is a wasteful number, since it uses less digits than its factorization.

1320021101124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 847612 (or 847601 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 1320021101124 its reverse (4211011200231), we get a palindrome (5531032301355).

The spelling of 1320021101124 in words is "one trillion, three hundred twenty billion, twenty-one million, one hundred one thousand, one hundred twenty-four".