1331233232220 has 72 divisors (see below), whose sum is σ = 4038171096960. Its totient is φ = 354987004800.

The previous prime is 1331233232207. The next prime is 1331233232237. The reversal of 1331233232220 is 222323321331.

1331233232220 is a `hidden beast` number, since 1 + 3 + 3 + 1 + 2 + 332 + 322 + 2 + 0 = 666.

It is a super-2 number, since 2×1331233232220² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

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, 11950741 + ... + 12061619.

It is an arithmetic number, because the mean of its divisors is an integer number (56085709680).

Almost surely, 2^{1331233232220} is an apocalyptic number.

1331233232220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1331233232220 is an abundant number, since it is smaller than the sum of its proper divisors (2706937864740).

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

1331233232220 is a wasteful number, since it uses less digits than its factorization.

1331233232220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177595 (or 177590 counting only the distinct ones).

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

Adding to 1331233232220 its reverse (222323321331), we get a palindrome (1553556553551).

The spelling of 1331233232220 in words is "one trillion, three hundred thirty-one billion, two hundred thirty-three million, two hundred thirty-two thousand, two hundred twenty".