20022121121 has 2 divisors, whose sum is σ = 20022121122. Its totient is φ = 20022121120.

The previous prime is 20022121103. The next prime is 20022121139. The reversal of 20022121121 is 12112122002.

It is a balanced prime because it is at equal distance from previous prime (20022121103) and next prime (20022121139).

It can be written as a sum of positive squares in only one way, i.e., 17540088721 + 2482032400 = 132439^2 + 49820^2 .

It is a cyclic number.

It is not a de Polignac number, because 20022121121 - 2¹⁸ = 20021858977 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20022121096 and 20022121105.

It is not a weakly prime, because it can be changed into another prime (20022121151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10011060560 + 10011060561.

It is an arithmetic number, because the mean of its divisors is an integer number (10011060561).

Almost surely, 2^20022121121 is an apocalyptic number.

It is an amenable number.

20022121121 is a deficient number, since it is larger than the sum of its proper divisors (1).

20022121121 is an equidigital number, since it uses as much as digits as its factorization.

20022121121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 20022121121 its reverse (12112122002), we get a palindrome (32134243123).

The spelling of 20022121121 in words is "twenty billion, twenty-two million, one hundred twenty-one thousand, one hundred twenty-one".