101220201010261 has 2 divisors, whose sum is σ = 101220201010262. Its totient is φ = 101220201010260.

The previous prime is 101220201010259. The next prime is 101220201010267. The reversal of 101220201010261 is 162010102022101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 95428867312900 + 5791333697361 = 9768770^2 + 2406519^2 .

It is a cyclic number.

It is not a de Polignac number, because 101220201010261 - 2¹ = 101220201010259 is a prime.

Together with 101220201010259, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101220201010267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50610100505130 + 50610100505131.

It is an arithmetic number, because the mean of its divisors is an integer number (50610100505131).

Almost surely, 2^{101220201010261} is an apocalyptic number.

It is an amenable number.

101220201010261 is a deficient number, since it is larger than the sum of its proper divisors (1).

101220201010261 is an equidigital number, since it uses as much as digits as its factorization.

101220201010261 is an evil number, because the sum of its binary digits is even.

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

Adding to 101220201010261 its reverse (162010102022101), we get a palindrome (263230303032362).

The spelling of 101220201010261 in words is "one hundred one trillion, two hundred twenty billion, two hundred one million, ten thousand, two hundred sixty-one".