210023101001221 has 2 divisors, whose sum is σ = 210023101001222. Its totient is φ = 210023101001220.

The previous prime is 210023101001167. The next prime is 210023101001243. The reversal of 210023101001221 is 122100101320012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 194986621265121 + 15036479736100 = 13963761^2 + 3877690^2 .

It is a cyclic number.

It is not a de Polignac number, because 210023101001221 - 2¹⁵ = 210023100968453 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 210023101001195 and 210023101001204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210023101601221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105011550500610 + 105011550500611.

It is an arithmetic number, because the mean of its divisors is an integer number (105011550500611).

Almost surely, 2^{210023101001221} is an apocalyptic number.

It is an amenable number.

210023101001221 is a deficient number, since it is larger than the sum of its proper divisors (1).

210023101001221 is an equidigital number, since it uses as much as digits as its factorization.

210023101001221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 210023101001221 its reverse (122100101320012), we get a palindrome (332123202321233).

The spelling of 210023101001221 in words is "two hundred ten trillion, twenty-three billion, one hundred one million, one thousand, two hundred twenty-one".