1212202130221 has 2 divisors, whose sum is σ = 1212202130222. Its totient is φ = 1212202130220.

The previous prime is 1212202130173. The next prime is 1212202130233. The reversal of 1212202130221 is 1220312022121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1208350562500 + 3851567721 = 1099250^2 + 62061^2 .

It is a cyclic number.

It is not a de Polignac number, because 1212202130221 - 2⁷ = 1212202130093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1212202131221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606101065110 + 606101065111.

It is an arithmetic number, because the mean of its divisors is an integer number (606101065111).

Almost surely, 2^{1212202130221} is an apocalyptic number.

It is an amenable number.

1212202130221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212202130221 is an equidigital number, since it uses as much as digits as its factorization.

1212202130221 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 19.

Adding to 1212202130221 its reverse (1220312022121), we get a palindrome (2432514152342).

The spelling of 1212202130221 in words is "one trillion, two hundred twelve billion, two hundred two million, one hundred thirty thousand, two hundred twenty-one".