211020020110261 has 2 divisors, whose sum is σ = 211020020110262. Its totient is φ = 211020020110260.

The previous prime is 211020020110223. The next prime is 211020020110283. The reversal of 211020020110261 is 162011020020112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 207771035490225 + 3248984620036 = 14414265^2 + 1802494^2 .

It is a cyclic number.

It is not a de Polignac number, because 211020020110261 - 2¹¹ = 211020020108213 is a prime.

It is a super-4 number, since 4×211020020110261⁴ (a number of 58 digits) contains 4444 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211020020110201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105510010055130 + 105510010055131.

It is an arithmetic number, because the mean of its divisors is an integer number (105510010055131).

Almost surely, 2^{211020020110261} is an apocalyptic number.

It is an amenable number.

211020020110261 is a deficient number, since it is larger than the sum of its proper divisors (1).

211020020110261 is an equidigital number, since it uses as much as digits as its factorization.

211020020110261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 211020020110261 its reverse (162011020020112), we get a palindrome (373031040130373).

The spelling of 211020020110261 in words is "two hundred eleven trillion, twenty billion, twenty million, one hundred ten thousand, two hundred sixty-one".