2072210001221 has 2 divisors, whose sum is σ = 2072210001222. Its totient is φ = 2072210001220.

The previous prime is 2072210001217. The next prime is 2072210001271. The reversal of 2072210001221 is 1221000122702.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1736494053121 + 335715948100 = 1317761^2 + 579410^2 .

It is a cyclic number.

It is not a de Polignac number, because 2072210001221 - 2² = 2072210001217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2072210001193 and 2072210001202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2072210001271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1036105000610 + 1036105000611.

It is an arithmetic number, because the mean of its divisors is an integer number (1036105000611).

Almost surely, 2^{2072210001221} is an apocalyptic number.

It is an amenable number.

2072210001221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2072210001221 is an equidigital number, since it uses as much as digits as its factorization.

2072210001221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 224, while the sum is 20.

Adding to 2072210001221 its reverse (1221000122702), we get a palindrome (3293210123923).

The spelling of 2072210001221 in words is "two trillion, seventy-two billion, two hundred ten million, one thousand, two hundred twenty-one".