220211110123021 has 2 divisors, whose sum is σ = 220211110123022. Its totient is φ = 220211110123020.

The previous prime is 220211110123001. The next prime is 220211110123073. The reversal of 220211110123021 is 120321011112022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 125158164882921 + 95052945240100 = 11187411^2 + 9749510^2 .

It is a cyclic number.

It is not a de Polignac number, because 220211110123021 - 2⁷ = 220211110122893 is a prime.

It is a super-2 number, since 2×220211110123021² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 220211110123021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220211110123001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110105555061510 + 110105555061511.

It is an arithmetic number, because the mean of its divisors is an integer number (110105555061511).

Almost surely, 2^{220211110123021} is an apocalyptic number.

It is an amenable number.

220211110123021 is a deficient number, since it is larger than the sum of its proper divisors (1).

220211110123021 is an equidigital number, since it uses as much as digits as its factorization.

220211110123021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 220211110123021 its reverse (120321011112022), we get a palindrome (340532121235043).

The spelling of 220211110123021 in words is "two hundred twenty trillion, two hundred eleven billion, one hundred ten million, one hundred twenty-three thousand, twenty-one".