20022102121261 has 2 divisors, whose sum is σ = 20022102121262. Its totient is φ = 20022102121260.

The previous prime is 20022102121201. The next prime is 20022102121361. The reversal of 20022102121261 is 16212120122002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20019628948900 + 2473172361 = 4474330^2 + 49731^2 .

It is a cyclic number.

It is not a de Polignac number, because 20022102121261 - 2¹¹ = 20022102119213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20022102121201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10011051060630 + 10011051060631.

It is an arithmetic number, because the mean of its divisors is an integer number (10011051060631).

Almost surely, 2^{20022102121261} is an apocalyptic number.

It is an amenable number.

20022102121261 is a deficient number, since it is larger than the sum of its proper divisors (1).

20022102121261 is an equidigital number, since it uses as much as digits as its factorization.

20022102121261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 22.

Adding to 20022102121261 its reverse (16212120122002), we get a palindrome (36234222243263).

The spelling of 20022102121261 in words is "twenty trillion, twenty-two billion, one hundred two million, one hundred twenty-one thousand, two hundred sixty-one".