110020121261 has 2 divisors, whose sum is σ = 110020121262. Its totient is φ = 110020121260.

The previous prime is 110020121201. The next prime is 110020121279. The reversal of 110020121261 is 162121020011.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 91139987236 + 18880134025 = 301894^2 + 137405^2 .

It is an emirp because it is prime and its reverse (162121020011) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-110020121261 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (110020121201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55010060630 + 55010060631.

It is an arithmetic number, because the mean of its divisors is an integer number (55010060631).

Almost surely, 2^110020121261 is an apocalyptic number.

It is an amenable number.

110020121261 is a deficient number, since it is larger than the sum of its proper divisors (1).

110020121261 is an equidigital number, since it uses as much as digits as its factorization.

110020121261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 110020121261 its reverse (162121020011), we get a palindrome (272141141272).

The spelling of 110020121261 in words is "one hundred ten billion, twenty million, one hundred twenty-one thousand, two hundred sixty-one".