1320111302020 has 144 divisors (see below), whose sum is σ = 3337257354480. Its totient is φ = 436843545600.

The previous prime is 1320111301997. The next prime is 1320111302033. The reversal of 1320111302020 is 202031110231.

It can be written as a sum of positive squares in 8 ways, for example, as 3364232004 + 1316747070016 = 58002^2 + 1147496^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1320111301985 and 1320111302003.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 98354910 + ... + 98368330.

It is an arithmetic number, because the mean of its divisors is an integer number (23175398295).

Almost surely, 2^{1320111302020} is an apocalyptic number.

1320111302020 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 1320111302020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1668628677240).

1320111302020 is an abundant number, since it is smaller than the sum of its proper divisors (2017146052460).

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

1320111302020 is a wasteful number, since it uses less digits than its factorization.

1320111302020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16934 (or 16925 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 1320111302020 its reverse (202031110231), we get a palindrome (1522142412251).

The spelling of 1320111302020 in words is "one trillion, three hundred twenty billion, one hundred eleven million, three hundred two thousand, twenty".