20221102261 has 2 divisors, whose sum is σ = 20221102262. Its totient is φ = 20221102260.

The previous prime is 20221102177. The next prime is 20221102277. The reversal of 20221102261 is 16220112202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14030402500 + 6190699761 = 118450^2 + 78681^2 .

It is a cyclic number.

It is not a de Polignac number, because 20221102261 - 2¹⁵ = 20221069493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20221102061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10110551130 + 10110551131.

It is an arithmetic number, because the mean of its divisors is an integer number (10110551131).

Almost surely, 2^20221102261 is an apocalyptic number.

It is an amenable number.

20221102261 is a deficient number, since it is larger than the sum of its proper divisors (1).

20221102261 is an equidigital number, since it uses as much as digits as its factorization.

20221102261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 20221102261 its reverse (16220112202), we get a palindrome (36441214463).

The spelling of 20221102261 in words is "twenty billion, two hundred twenty-one million, one hundred two thousand, two hundred sixty-one".