1331021212320 has 96 divisors (see below), whose sum is σ = 4193196336000. Its totient is φ = 354898396160.

The previous prime is 1331021212319. The next prime is 1331021212337. The reversal of 1331021212320 is 232121201331.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-3 number, since 3×1331021212320³ (a number of 37 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4165450 + ... + 4473590.

It is an arithmetic number, because the mean of its divisors is an integer number (43679128500).

Almost surely, 2^{1331021212320} is an apocalyptic number.

1331021212320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1331021212320 is an abundant number, since it is smaller than the sum of its proper divisors (2862175123680).

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

1331021212320 is a wasteful number, since it uses less digits than its factorization.

1331021212320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317158 (or 317150 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 1331021212320 its reverse (232121201331), we get a palindrome (1563142413651).

The spelling of 1331021212320 in words is "one trillion, three hundred thirty-one billion, twenty-one million, two hundred twelve thousand, three hundred twenty".