20221010261 has 2 divisors, whose sum is σ = 20221010262. Its totient is φ = 20221010260.

The previous prime is 20221010237. The next prime is 20221010263. The reversal of 20221010261 is 16201012202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10174756900 + 10046253361 = 100870^2 + 100231^2 .

It is a cyclic number.

It is not a de Polignac number, because 20221010261 - 2⁶ = 20221010197 is a prime.

Together with 20221010263, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20221010263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10110505130 + 10110505131.

It is an arithmetic number, because the mean of its divisors is an integer number (10110505131).

Almost surely, 2^20221010261 is an apocalyptic number.

It is an amenable number.

20221010261 is a deficient number, since it is larger than the sum of its proper divisors (1).

20221010261 is an equidigital number, since it uses as much as digits as its factorization.

20221010261 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 17.

Adding to 20221010261 its reverse (16201012202), we get a palindrome (36422022463).

The spelling of 20221010261 in words is "twenty billion, two hundred twenty-one million, ten thousand, two hundred sixty-one".