20022224021 has 2 divisors, whose sum is σ = 20022224022. Its totient is φ = 20022224020.

The previous prime is 20022223961. The next prime is 20022224029. The reversal of 20022224021 is 12042222002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10030022500 + 9992201521 = 100150^2 + 99961^2 .

It is a cyclic number.

It is not a de Polignac number, because 20022224021 - 2⁶ = 20022223957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20022224029) 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, 10011112010 + 10011112011.

It is an arithmetic number, because the mean of its divisors is an integer number (10011112011).

Almost surely, 2^20022224021 is an apocalyptic number.

It is an amenable number.

20022224021 is a deficient number, since it is larger than the sum of its proper divisors (1).

20022224021 is an equidigital number, since it uses as much as digits as its factorization.

20022224021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 256, while the sum is 17.

Adding to 20022224021 its reverse (12042222002), we get a palindrome (32064446023).

The spelling of 20022224021 in words is "twenty billion, twenty-two million, two hundred twenty-four thousand, twenty-one".