101101021261 has 2 divisors, whose sum is σ = 101101021262. Its totient is φ = 101101021260.

The previous prime is 101101021211. The next prime is 101101021297. The reversal of 101101021261 is 162120101101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 100685636100 + 415385161 = 317310^2 + 20381^2 .

It is a cyclic number.

It is not a de Polignac number, because 101101021261 - 2¹¹ = 101101019213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101101021211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50550510630 + 50550510631.

It is an arithmetic number, because the mean of its divisors is an integer number (50550510631).

Almost surely, 2^101101021261 is an apocalyptic number.

It is an amenable number.

101101021261 is a deficient number, since it is larger than the sum of its proper divisors (1).

101101021261 is an equidigital number, since it uses as much as digits as its factorization.

101101021261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 101101021261 its reverse (162120101101), we get a palindrome (263221122362).

The spelling of 101101021261 in words is "one hundred one billion, one hundred one million, twenty-one thousand, two hundred sixty-one".