1331223323220 has 288 divisors, whose sum is σ = 4646218606848. Its totient is φ = 302222278656.

The previous prime is 1331223323201. The next prime is 1331223323251. The reversal of 1331223323220 is 223233221331.

1331223323220 is a `hidden beast` number, since 1 + 3 + 3 + 1 + 2 + 2 + 332 + 322 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 113029972 + ... + 113041748.

It is an arithmetic number, because the mean of its divisors is an integer number (16132703496).

Almost surely, 2^{1331223323220} is an apocalyptic number.

1331223323220 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 1331223323220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2323109303424).

1331223323220 is an abundant number, since it is smaller than the sum of its proper divisors (3314995283628).

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

1331223323220 is a wasteful number, since it uses less digits than its factorization.

1331223323220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12399 (or 12394 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 27.

Adding to 1331223323220 its reverse (223233221331), we get a palindrome (1554456544551).

The spelling of 1331223323220 in words is "one trillion, three hundred thirty-one billion, two hundred twenty-three million, three hundred twenty-three thousand, two hundred twenty".