221210121212203 has 16 divisors (see below), whose sum is σ = 233786256359040. Its totient is φ = 208727377200000.

The previous prime is 221210121212147. The next prime is 221210121212209. The reversal of 221210121212203 is 302212121012122.

It is a cyclic number.

It is not a de Polignac number, because 221210121212203 - 2⁴⁵ = 186025749123371 is a prime.

It is a super-2 number, since 2×221210121212203² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221210121212209) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 199033251 + ... + 200141587.

It is an arithmetic number, because the mean of its divisors is an integer number (14611641022440).

Almost surely, 2^{221210121212203} is an apocalyptic number.

221210121212203 is a deficient number, since it is larger than the sum of its proper divisors (12576135146837).

221210121212203 is a wasteful number, since it uses less digits than its factorization.

221210121212203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1150458.

The product of its (nonzero) digits is 384, while the sum is 22.

Adding to 221210121212203 its reverse (302212121012122), we get a palindrome (523422242224325).

The spelling of 221210121212203 in words is "two hundred twenty-one trillion, two hundred ten billion, one hundred twenty-one million, two hundred twelve thousand, two hundred three".