1221031320300 has 108 divisors (see below), whose sum is σ = 4175187130296. Its totient is φ = 296007590400.

The previous prime is 1221031320287. The next prime is 1221031320329. The reversal of 1221031320300 is 30231301221.

1221031320300 is a `hidden beast` number, since 1 + 2 + 2 + 10 + 31 + 320 + 300 = 666.

It is a super-2 number, since 2×1221031320300² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 61658349 + ... + 61678148.

Almost surely, 2^{1221031320300} is an apocalyptic number.

1221031320300 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1221031320300 is an abundant number, since it is smaller than the sum of its proper divisors (2954155809996).

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

1221031320300 is a wasteful number, since it uses less digits than its factorization.

1221031320300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123336528 (or 123336518 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 1221031320300 its reverse (30231301221), we get a palindrome (1251262621521).

The spelling of 1221031320300 in words is "one trillion, two hundred twenty-one billion, thirty-one million, three hundred twenty thousand, three hundred".