1221011300330 has 16 divisors (see below), whose sum is σ = 2197915002504. Its totient is φ = 488383484160.

The previous prime is 1221011300321. The next prime is 1221011300387. The reversal of 1221011300330 is 330031101221.

It can be written as a sum of positive squares in 4 ways, for example, as 1208607800689 + 12403499641 = 1099367^2 + 111371^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1221011300299 and 1221011300308.

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, 2384627 + ... + 2851046.

Almost surely, 2^{1221011300330} is an apocalyptic number.

1221011300330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221011300330 is a deficient number, since it is larger than the sum of its proper divisors (976903702174).

1221011300330 is a wasteful number, since it uses less digits than its factorization.

1221011300330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5259001.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 1221011300330 its reverse (330031101221), we get a palindrome (1551042401551).

The spelling of 1221011300330 in words is "one trillion, two hundred twenty-one billion, eleven million, three hundred thousand, three hundred thirty".