1221301123313 has 8 divisors (see below), whose sum is σ = 1247930566848. Its totient is φ = 1194804495664.

The previous prime is 1221301123267. The next prime is 1221301123321. The reversal of 1221301123313 is 3133211031221.

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 1221301123313 - 2²⁸ = 1221032687857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1221301123373) 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, 33185381 + ... + 33222162.

It is an arithmetic number, because the mean of its divisors is an integer number (155991320856).

Almost surely, 2^{1221301123313} is an apocalyptic number.

It is an amenable number.

1221301123313 is a deficient number, since it is larger than the sum of its proper divisors (26629443535).

1221301123313 is an equidigital number, since it uses as much as digits as its factorization.

1221301123313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66407943.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 1221301123313 its reverse (3133211031221), we get a palindrome (4354512154534).

The spelling of 1221301123313 in words is "one trillion, two hundred twenty-one billion, three hundred one million, one hundred twenty-three thousand, three hundred thirteen".