1230220200221 has 2 divisors, whose sum is σ = 1230220200222. Its totient is φ = 1230220200220.

The previous prime is 1230220200169. The next prime is 1230220200233. The reversal of 1230220200221 is 1220020220321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1149160416121 + 81059784100 = 1071989^2 + 284710^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1230220200221 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1230220200221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1230220200241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615110100110 + 615110100111.

It is an arithmetic number, because the mean of its divisors is an integer number (615110100111).

Almost surely, 2^{1230220200221} is an apocalyptic number.

It is an amenable number.

1230220200221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1230220200221 is an equidigital number, since it uses as much as digits as its factorization.

1230220200221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 1230220200221 its reverse (1220020220321), we get a palindrome (2450240420542).

The spelling of 1230220200221 in words is "one trillion, two hundred thirty billion, two hundred twenty million, two hundred thousand, two hundred twenty-one".