1320231021210 has 56 divisors (see below), whose sum is σ = 3562993862100. Its totient is φ = 352061603712.

The previous prime is 1320231021173. The next prime is 1320231021211. The reversal of 1320231021210 is 121201320231.

1320231021210 is a `hidden beast` number, since 1 + 320 + 2 + 310 + 21 + 2 + 10 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1171011829689 + 149219191521 = 1082133^2 + 386289^2 .

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

It is not an unprimeable number, because it can be changed into a prime (1320231021211) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 90543535 + ... + 90558114.

Almost surely, 2^{1320231021210} is an apocalyptic number.

1320231021210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1320231021210 is an abundant number, since it is smaller than the sum of its proper divisors (2242762840890).

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

1320231021210 is an equidigital number, since it uses as much as digits as its factorization.

1320231021210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181101674 (or 181101659 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 1320231021210 its reverse (121201320231), we get a palindrome (1441432341441).

The spelling of 1320231021210 in words is "one trillion, three hundred twenty billion, two hundred thirty-one million, twenty-one thousand, two hundred ten".