20110022021 has 2 divisors, whose sum is σ = 20110022022. Its totient is φ = 20110022020.

The previous prime is 20110021961. The next prime is 20110022027. The reversal of 20110022021 is 12022001102.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15791692225 + 4318329796 = 125665^2 + 65714^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20110022021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20110021993 and 20110022011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20110022027) 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, 10055011010 + 10055011011.

It is an arithmetic number, because the mean of its divisors is an integer number (10055011011).

Almost surely, 2^20110022021 is an apocalyptic number.

It is an amenable number.

20110022021 is a deficient number, since it is larger than the sum of its proper divisors (1).

20110022021 is an equidigital number, since it uses as much as digits as its factorization.

20110022021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 20110022021 its reverse (12022001102), we get a palindrome (32132023123).

The spelling of 20110022021 in words is "twenty billion, one hundred ten million, twenty-two thousand, twenty-one".