1221301312302 has 16 divisors (see below), whose sum is σ = 2445368889600. Its totient is φ = 406639393272.

The previous prime is 1221301312291. The next prime is 1221301312327. The reversal of 1221301312302 is 2032131031221.

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, 115255302 + ... + 115265897.

It is an arithmetic number, because the mean of its divisors is an integer number (152835555600).

Almost surely, 2^{1221301312302} is an apocalyptic number.

1221301312302 is an abundant number, since it is smaller than the sum of its proper divisors (1224067577298).

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

1221301312302 is a wasteful number, since it uses less digits than its factorization.

1221301312302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230522087.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 1221301312302 its reverse (2032131031221), we get a palindrome (3253432343523).

The spelling of 1221301312302 in words is "one trillion, two hundred twenty-one billion, three hundred one million, three hundred twelve thousand, three hundred two".