1221201223113 has 8 divisors (see below), whose sum is σ = 1633404791808. Its totient is φ = 811565901584.

The previous prime is 1221201223097. The next prime is 1221201223127. The reversal of 1221201223113 is 3113221021221.

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 1221201223113 - 2⁴ = 1221201223097 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1221201223113.

It is not an unprimeable number, because it can be changed into a prime (1221201223213) 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, 642060681 + ... + 642062582.

It is an arithmetic number, because the mean of its divisors is an integer number (204175598976).

Almost surely, 2^{1221201223113} is an apocalyptic number.

It is an amenable number.

1221201223113 is a deficient number, since it is larger than the sum of its proper divisors (412203568695).

1221201223113 is a wasteful number, since it uses less digits than its factorization.

1221201223113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1284123583.

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

Adding to 1221201223113 its reverse (3113221021221), we get a palindrome (4334422244334).

The spelling of 1221201223113 in words is "one trillion, two hundred twenty-one billion, two hundred one million, two hundred twenty-three thousand, one hundred thirteen".