221210212100231 has 2 divisors, whose sum is σ = 221210212100232. Its totient is φ = 221210212100230.

The previous prime is 221210212100221. The next prime is 221210212100279. The reversal of 221210212100231 is 132001212012122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221210212100231 - 2⁶ = 221210212100167 is a prime.

It is a super-2 number, since 2×221210212100231² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221210212100201) 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 as a sum of consecutive naturals, namely, 110605106050115 + 110605106050116.

It is an arithmetic number, because the mean of its divisors is an integer number (110605106050116).

Almost surely, 2^{221210212100231} is an apocalyptic number.

221210212100231 is a deficient number, since it is larger than the sum of its proper divisors (1).

221210212100231 is an equidigital number, since it uses as much as digits as its factorization.

221210212100231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 221210212100231 its reverse (132001212012122), we get a palindrome (353211424112353).

The spelling of 221210212100231 in words is "two hundred twenty-one trillion, two hundred ten billion, two hundred twelve million, one hundred thousand, two hundred thirty-one".