1331223002220 has 96 divisors (see below), whose sum is σ = 3828589523136. Its totient is φ = 345360153600.

The previous prime is 1331223002189. The next prime is 1331223002231. The reversal of 1331223002220 is 222003221331.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23906010 + ... + 23961630.

It is an arithmetic number, because the mean of its divisors is an integer number (39881140866).

Almost surely, 2^{1331223002220} is an apocalyptic number.

1331223002220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1331223002220 is an abundant number, since it is smaller than the sum of its proper divisors (2497366520916).

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

1331223002220 is a wasteful number, since it uses less digits than its factorization.

1331223002220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66451 (or 66449 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 1331223002220 its reverse (222003221331), we get a palindrome (1553226223551).

The spelling of 1331223002220 in words is "one trillion, three hundred thirty-one billion, two hundred twenty-three million, two thousand, two hundred twenty".