1221210041330 has 16 divisors (see below), whose sum is σ = 2198564296344. Its totient is φ = 488398189440.

The previous prime is 1221210041321. The next prime is 1221210041339. The reversal of 1221210041330 is 331400121221.

It is an interprime number because it is at equal distance from previous prime (1221210041321) and next prime (1221210041339).

It can be written as a sum of positive squares in 4 ways, for example, as 343104234001 + 878105807329 = 585751^2 + 937073^2 .

It is not an unprimeable number, because it can be changed into a prime (1221210041339) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10668611 + ... + 10782470.

Almost surely, 2^{1221210041330} is an apocalyptic number.

1221210041330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221210041330 is a deficient number, since it is larger than the sum of its proper divisors (977354255014).

1221210041330 is a wasteful number, since it uses less digits than its factorization.

1221210041330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21456781.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 1221210041330 its reverse (331400121221), we get a palindrome (1552610162551).

The spelling of 1221210041330 in words is "one trillion, two hundred twenty-one billion, two hundred ten million, forty-one thousand, three hundred thirty".