1220320302320 has 40 divisors (see below), whose sum is σ = 3242565376224. Its totient is φ = 418395532032.

The previous prime is 1220320302269. The next prime is 1220320302361. The reversal of 1220320302320 is 232030230221.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-3 number, since 3×1220320302320³ (a number of 37 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1220320302292 and 1220320302301.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1089571139 + ... + 1089572258.

Almost surely, 2^{1220320302320} is an apocalyptic number.

1220320302320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220320302320 is an abundant number, since it is smaller than the sum of its proper divisors (2022245073904).

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

1220320302320 is a wasteful number, since it uses less digits than its factorization.

1220320302320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2179143417 (or 2179143411 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 20.

Adding to 1220320302320 its reverse (232030230221), we get a palindrome (1452350532541).

The spelling of 1220320302320 in words is "one trillion, two hundred twenty billion, three hundred twenty million, three hundred two thousand, three hundred twenty".