1221310201304 has 32 divisors (see below), whose sum is σ = 2345051796480. Its totient is φ = 596033863584.

The previous prime is 1221310201271. The next prime is 1221310201357. The reversal of 1221310201304 is 4031020131221.

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, 4287302 + ... + 4563285.

It is an arithmetic number, because the mean of its divisors is an integer number (73282868640).

Almost surely, 2^{1221310201304} is an apocalyptic number.

It is an amenable number.

1221310201304 is a deficient number, since it is larger than the sum of its proper divisors (1123741595176).

1221310201304 is a wasteful number, since it uses less digits than its factorization.

1221310201304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8851007 (or 8851003 counting only the distinct ones).

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

Adding to 1221310201304 its reverse (4031020131221), we get a palindrome (5252330332525).

The spelling of 1221310201304 in words is "one trillion, two hundred twenty-one billion, three hundred ten million, two hundred one thousand, three hundred four".