221212321000203 has 8 divisors (see below), whose sum is σ = 317638204513168. Its totient is φ = 136130659077024.

The previous prime is 221212321000193. The next prime is 221212321000219. The reversal of 221212321000203 is 302000123212122.

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

It is not a de Polignac number, because 221212321000203 - 2²⁵ = 221212287445771 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221212321000203.

It is not an unprimeable number, because it can be changed into a prime (221212321000403) 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, 2836055397400 + ... + 2836055397477.

It is an arithmetic number, because the mean of its divisors is an integer number (39704775564146).

Almost surely, 2^{221212321000203} is an apocalyptic number.

221212321000203 is a deficient number, since it is larger than the sum of its proper divisors (96425883512965).

221212321000203 is a wasteful number, since it uses less digits than its factorization.

221212321000203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5672110794893.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 221212321000203 its reverse (302000123212122), we get a palindrome (523212444212325).

The spelling of 221212321000203 in words is "two hundred twenty-one trillion, two hundred twelve billion, three hundred twenty-one million, two hundred three", and thus it is an aban number.