20022210121 has 2 divisors, whose sum is σ = 20022210122. Its totient is φ = 20022210120.

The previous prime is 20022210083. The next prime is 20022210181. The reversal of 20022210121 is 12101222002.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10020010000 + 10002200121 = 100100^2 + 100011^2 .

It is a cyclic number.

It is not a de Polignac number, because 20022210121 - 2⁷ = 20022209993 is a prime.

It is not a weakly prime, because it can be changed into another prime (20022210181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10011105060 + 10011105061.

It is an arithmetic number, because the mean of its divisors is an integer number (10011105061).

Almost surely, 2^20022210121 is an apocalyptic number.

It is an amenable number.

20022210121 is a deficient number, since it is larger than the sum of its proper divisors (1).

20022210121 is an equidigital number, since it uses as much as digits as its factorization.

20022210121 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 13.

Adding to 20022210121 its reverse (12101222002), we get a palindrome (32123432123).

The spelling of 20022210121 in words is "twenty billion, twenty-two million, two hundred ten thousand, one hundred twenty-one".