103210210261 has 2 divisors, whose sum is σ = 103210210262. Its totient is φ = 103210210260.

The previous prime is 103210210211. The next prime is 103210210273. The reversal of 103210210261 is 162012012301.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 82331694225 + 20878516036 = 286935^2 + 144494^2 .

It is an emirp because it is prime and its reverse (162012012301) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 103210210261 - 2²⁷ = 103075992533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (103210210211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51605105130 + 51605105131.

It is an arithmetic number, because the mean of its divisors is an integer number (51605105131).

Almost surely, 2^103210210261 is an apocalyptic number.

It is an amenable number.

103210210261 is a deficient number, since it is larger than the sum of its proper divisors (1).

103210210261 is an equidigital number, since it uses as much as digits as its factorization.

103210210261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 103210210261 its reverse (162012012301), we get a palindrome (265222222562).

The spelling of 103210210261 in words is "one hundred three billion, two hundred ten million, two hundred ten thousand, two hundred sixty-one".