221453235412 has 24 divisors (see below), whose sum is σ = 395370964800. Its totient is φ = 108502095936.

The previous prime is 221453235407. The next prime is 221453235439. The reversal of 221453235412 is 214532354122.

221453235412 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1425112 + ... + 1572847.

It is an arithmetic number, because the mean of its divisors is an integer number (16473790200).

Almost surely, 2^221453235412 is an apocalyptic number.

It is an amenable number.

221453235412 is a deficient number, since it is larger than the sum of its proper divisors (173917729388).

221453235412 is a wasteful number, since it uses less digits than its factorization.

221453235412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2998335 (or 2998333 counting only the distinct ones).

The product of its digits is 57600, while the sum is 34.

Adding to 221453235412 its reverse (214532354122), we get a palindrome (435985589534).

The spelling of 221453235412 in words is "two hundred twenty-one billion, four hundred fifty-three million, two hundred thirty-five thousand, four hundred twelve".