1223452543221 has 48 divisors (see below), whose sum is σ = 1822415474880. Its totient is φ = 790666356480.

The previous prime is 1223452543219. The next prime is 1223452543273.

1223452543221 is a `hidden beast` number, since 1 + 2 + 234 + 52 + 54 + 322 + 1 = 666.

1223452543221 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 1223452543221 - 2¹ = 1223452543219 is a prime.

It is a super-2 number, since 2×1223452543221² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223452543321) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8639035 + ... + 8779511.

It is an arithmetic number, because the mean of its divisors is an integer number (37966989060).

Almost surely, 2^{1223452543221} is an apocalyptic number.

It is an amenable number.

1223452543221 is a deficient number, since it is larger than the sum of its proper divisors (598962931659).

1223452543221 is a wasteful number, since it uses less digits than its factorization.

1223452543221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140786 (or 140783 counting only the distinct ones).

The product of its digits is 115200, while the sum is 36.

The spelling of 1223452543221 in words is "one trillion, two hundred twenty-three billion, four hundred fifty-two million, five hundred forty-three thousand, two hundred twenty-one".