102201210100261 has 2 divisors, whose sum is σ = 102201210100262. Its totient is φ = 102201210100260.

The previous prime is 102201210100243. The next prime is 102201210100277. The reversal of 102201210100261 is 162001012102201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71077865931361 + 31123344168900 = 8430769^2 + 5578830^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102201210100261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102201210100291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51100605050130 + 51100605050131.

It is an arithmetic number, because the mean of its divisors is an integer number (51100605050131).

Almost surely, 2^{102201210100261} is an apocalyptic number.

It is an amenable number.

102201210100261 is a deficient number, since it is larger than the sum of its proper divisors (1).

102201210100261 is an equidigital number, since it uses as much as digits as its factorization.

102201210100261 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 102201210100261 its reverse (162001012102201), we get a palindrome (264202222202462).

The spelling of 102201210100261 in words is "one hundred two trillion, two hundred one billion, two hundred ten million, one hundred thousand, two hundred sixty-one".