1221321401301 has 8 divisors (see below), whose sum is σ = 1668146304384. Its totient is φ = 794355382880.

The previous prime is 1221321401297. The next prime is 1221321401323. The reversal of 1221321401301 is 1031041231221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1221321401301 - 2² = 1221321401297 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221321401381) 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, 4964721021 + ... + 4964721266.

It is an arithmetic number, because the mean of its divisors is an integer number (208518288048).

Almost surely, 2^{1221321401301} is an apocalyptic number.

It is an amenable number.

1221321401301 is a deficient number, since it is larger than the sum of its proper divisors (446824903083).

1221321401301 is an equidigital number, since it uses as much as digits as its factorization.

1221321401301 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9929442331.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 1221321401301 its reverse (1031041231221), we get a palindrome (2252362632522).

The spelling of 1221321401301 in words is "one trillion, two hundred twenty-one billion, three hundred twenty-one million, four hundred one thousand, three hundred one".