1223122213221 has 8 divisors (see below), whose sum is σ = 1631156260800. Its totient is φ = 815251487232.

The previous prime is 1223122213121. The next prime is 1223122213273.

1223122213221 is nontrivially palindromic in base 10.

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

It is not a de Polignac number, because 1223122213221 - 2⁹ = 1223122212709 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1223122213191 and 1223122213200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223122213121) 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, 40812921 + ... + 40842878.

It is an arithmetic number, because the mean of its divisors is an integer number (203894532600).

Almost surely, 2^{1223122213221} is an apocalyptic number.

It is an amenable number.

1223122213221 is a deficient number, since it is larger than the sum of its proper divisors (408034047579).

1223122213221 is an equidigital number, since it uses as much as digits as its factorization.

1223122213221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81660795.

The product of its digits is 1152, while the sum is 24.

The spelling of 1223122213221 in words is "one trillion, two hundred twenty-three billion, one hundred twenty-two million, two hundred thirteen thousand, two hundred twenty-one".