1320231002220 has 72 divisors (see below), whose sum is σ = 4312754614896. Its totient is φ = 324979938432.

The previous prime is 1320231002171. The next prime is 1320231002243. The reversal of 1320231002220 is 222001320231.

1320231002220 is a `hidden beast` number, since 1 + 320 + 23 + 100 + 2 + 220 = 666.

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 = 1320231002193 and 1320231002202.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 282098302 + ... + 282102981.

Almost surely, 2^{1320231002220} is an apocalyptic number.

1320231002220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1320231002220 is an abundant number, since it is smaller than the sum of its proper divisors (2992523612676).

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

1320231002220 is a wasteful number, since it uses less digits than its factorization.

1320231002220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 564201311 (or 564201306 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 1320231002220 its reverse (222001320231), we get a palindrome (1542232322451).

The spelling of 1320231002220 in words is "one trillion, three hundred twenty billion, two hundred thirty-one million, two thousand, two hundred twenty".