1230210011221 has 2 divisors, whose sum is σ = 1230210011222. Its totient is φ = 1230210011220.

The previous prime is 1230210011203. The next prime is 1230210011227. The reversal of 1230210011221 is 1221100120321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1054238151121 + 175971860100 = 1026761^2 + 419490^2 .

It is a cyclic number.

It is not a de Polignac number, because 1230210011221 - 2⁵ = 1230210011189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1230210011195 and 1230210011204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1230210011227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615105005610 + 615105005611.

It is an arithmetic number, because the mean of its divisors is an integer number (615105005611).

Almost surely, 2^{1230210011221} is an apocalyptic number.

It is an amenable number.

1230210011221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1230210011221 is an equidigital number, since it uses as much as digits as its factorization.

1230210011221 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 1230210011221 its reverse (1221100120321), we get a palindrome (2451310131542).

The spelling of 1230210011221 in words is "one trillion, two hundred thirty billion, two hundred ten million, eleven thousand, two hundred twenty-one".