212220002261 has 2 divisors, whose sum is σ = 212220002262. Its totient is φ = 212220002260.

The previous prime is 212220002243. The next prime is 212220002303. The reversal of 212220002261 is 162200022212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 202595411236 + 9624591025 = 450106^2 + 98105^2 .

It is a cyclic number.

It is not a de Polignac number, because 212220002261 - 2¹⁰ = 212220001237 is a prime.

It is a super-2 number, since 2×212220002261² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212220032261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106110001130 + 106110001131.

It is an arithmetic number, because the mean of its divisors is an integer number (106110001131).

Almost surely, 2^212220002261 is an apocalyptic number.

It is an amenable number.

212220002261 is a deficient number, since it is larger than the sum of its proper divisors (1).

212220002261 is an equidigital number, since it uses as much as digits as its factorization.

212220002261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 212220002261 its reverse (162200022212), we get a palindrome (374420024473).

The spelling of 212220002261 in words is "two hundred twelve billion, two hundred twenty million, two thousand, two hundred sixty-one".