210022202120261 has 2 divisors, whose sum is σ = 210022202120262. Its totient is φ = 210022202120260.

The previous prime is 210022202120251. The next prime is 210022202120293. The reversal of 210022202120261 is 162021202220012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 207601097240161 + 2421104880100 = 14408369^2 + 1555990^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-210022202120261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210022202120221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105011101060130 + 105011101060131.

It is an arithmetic number, because the mean of its divisors is an integer number (105011101060131).

Almost surely, 2^{210022202120261} is an apocalyptic number.

It is an amenable number.

210022202120261 is a deficient number, since it is larger than the sum of its proper divisors (1).

210022202120261 is an equidigital number, since it uses as much as digits as its factorization.

210022202120261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 210022202120261 its reverse (162021202220012), we get a palindrome (372043404340273).

The spelling of 210022202120261 in words is "two hundred ten trillion, twenty-two billion, two hundred two million, one hundred twenty thousand, two hundred sixty-one".