1223406043221 has 16 divisors (see below), whose sum is σ = 1648426896000. Its totient is φ = 807005083200.

The previous prime is 1223406043217. The next prime is 1223406043229.

1223406043221 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 1223406043221 - 2² = 1223406043217 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223406043229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 840846 + ... + 1775903.

It is an arithmetic number, because the mean of its divisors is an integer number (103026681000).

Almost surely, 2^{1223406043221} is an apocalyptic number.

It is an amenable number.

1223406043221 is a deficient number, since it is larger than the sum of its proper divisors (425020852779).

1223406043221 is a wasteful number, since it uses less digits than its factorization.

1223406043221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2618396.

The product of its (nonzero) digits is 13824, while the sum is 30.

The spelling of 1223406043221 in words is "one trillion, two hundred twenty-three billion, four hundred six million, forty-three thousand, two hundred twenty-one".