22102101020261 has 2 divisors, whose sum is σ = 22102101020262. Its totient is φ = 22102101020260.

The previous prime is 22102101020257. The next prime is 22102101020309. The reversal of 22102101020261 is 16202010120122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21252044680036 + 850056340225 = 4609994^2 + 921985^2 .

It is a cyclic number.

It is not a de Polignac number, because 22102101020261 - 2² = 22102101020257 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22102401020261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11051050510130 + 11051050510131.

It is an arithmetic number, because the mean of its divisors is an integer number (11051050510131).

Almost surely, 2^{22102101020261} is an apocalyptic number.

It is an amenable number.

22102101020261 is a deficient number, since it is larger than the sum of its proper divisors (1).

22102101020261 is an equidigital number, since it uses as much as digits as its factorization.

22102101020261 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 20.

Adding to 22102101020261 its reverse (16202010120122), we get a palindrome (38304111140383).

The spelling of 22102101020261 in words is "twenty-two trillion, one hundred two billion, one hundred one million, twenty thousand, two hundred sixty-one".