1221413230305 has 12 divisors (see below), whose sum is σ = 2117116265940. Its totient is φ = 651420389472.

The previous prime is 1221413230267. The next prime is 1221413230307. The reversal of 1221413230305 is 5030323141221.

1221413230305 is a `hidden beast` number, since 1 + 22 + 14 + 1 + 323 + 0 + 305 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 662076769761 + 559336460544 = 813681^2 + 747888^2 .

It is not a de Polignac number, because 1221413230305 - 2²³ = 1221404841697 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1221413230307) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13571258070 + ... + 13571258159.

It is an arithmetic number, because the mean of its divisors is an integer number (176426355495).

Almost surely, 2^{1221413230305} is an apocalyptic number.

1221413230305 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1221413230305 is a deficient number, since it is larger than the sum of its proper divisors (895703035635).

1221413230305 is a wasteful number, since it uses less digits than its factorization.

1221413230305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27142516240 (or 27142516237 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

Adding to 1221413230305 its reverse (5030323141221), we get a palindrome (6251736371526).

The spelling of 1221413230305 in words is "one trillion, two hundred twenty-one billion, four hundred thirteen million, two hundred thirty thousand, three hundred five".