1331302212020 has 144 divisors (see below), whose sum is σ = 3107269834704. Its totient is φ = 478722816000.

The previous prime is 1331302212007. The next prime is 1331302212061. The reversal of 1331302212020 is 202122031331.

It can be written as a sum of positive squares in 8 ways, for example, as 2709410704 + 1328592801316 = 52052^2 + 1152646^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1331302211983 and 1331302212001.

It is a congruent number.

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, 229018634 + ... + 229024446.

It is an arithmetic number, because the mean of its divisors is an integer number (21578262741).

Almost surely, 2^{1331302212020} is an apocalyptic number.

1331302212020 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 1331302212020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1553634917352).

1331302212020 is an abundant number, since it is smaller than the sum of its proper divisors (1775967622684).

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

1331302212020 is a wasteful number, since it uses less digits than its factorization.

1331302212020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6882 (or 6869 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 1331302212020 its reverse (202122031331), we get a palindrome (1533424243351).

The spelling of 1331302212020 in words is "one trillion, three hundred thirty-one billion, three hundred two million, two hundred twelve thousand, twenty".