1221000222113 has 8 divisors (see below), whose sum is σ = 1395526338432. Its totient is φ = 1046498484096.

The previous prime is 1221000222031. The next prime is 1221000222131. The reversal of 1221000222113 is 3112220001221.

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 1221000222113 - 2²⁴ = 1220983444897 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1221000222091 and 1221000222100.

It is not an unprimeable number, because it can be changed into a prime (1221000222613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5987120 + ... + 6187697.

It is an arithmetic number, because the mean of its divisors is an integer number (174440792304).

Almost surely, 2^{1221000222113} is an apocalyptic number.

It is an amenable number.

1221000222113 is a deficient number, since it is larger than the sum of its proper divisors (174526116319).

1221000222113 is a wasteful number, since it uses less digits than its factorization.

1221000222113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12189151.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 1221000222113 its reverse (3112220001221), we get a palindrome (4333220223334).

The spelling of 1221000222113 in words is "one trillion, two hundred twenty-one billion, two hundred twenty-two thousand, one hundred thirteen".