20021110223 has 2 divisors, whose sum is σ = 20021110224. Its totient is φ = 20021110222.

The previous prime is 20021110177. The next prime is 20021110349. The reversal of 20021110223 is 32201112002.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20021110223 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20021110198 and 20021110207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20021110523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10010555111 + 10010555112.

It is an arithmetic number, because the mean of its divisors is an integer number (10010555112).

Almost surely, 2^20021110223 is an apocalyptic number.

20021110223 is a deficient number, since it is larger than the sum of its proper divisors (1).

20021110223 is an equidigital number, since it uses as much as digits as its factorization.

20021110223 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 20021110223 its reverse (32201112002), we get a palindrome (52222222225).

The spelling of 20021110223 in words is "twenty billion, twenty-one million, one hundred ten thousand, two hundred twenty-three".