3121302220320 has 96 divisors (see below), whose sum is σ = 10410460962048. Its totient is φ = 783385653248.

The previous prime is 3121302220249. The next prime is 3121302220349. The reversal of 3121302220320 is 230222031213.

It is a happy number.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 191248104 + ... + 191264423.

It is an arithmetic number, because the mean of its divisors is an integer number (108442301688).

Almost surely, 2^{3121302220320} is an apocalyptic number.

3121302220320 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3121302220320 is an abundant number, since it is smaller than the sum of its proper divisors (7289158741728).

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

3121302220320 is a wasteful number, since it uses less digits than its factorization.

3121302220320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382512562 (or 382512554 counting only the distinct ones).

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

Adding to 3121302220320 its reverse (230222031213), we get a palindrome (3351524251533).

The spelling of 3121302220320 in words is "three trillion, one hundred twenty-one billion, three hundred two million, two hundred twenty thousand, three hundred twenty".