21220201010023 has 2 divisors, whose sum is σ = 21220201010024. Its totient is φ = 21220201010022.

The previous prime is 21220201009967. The next prime is 21220201010219. The reversal of 21220201010023 is 32001010202212.

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-21220201010023 is a prime.

It is a super-2 number, since 2×21220201010023² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21220201009979 and 21220201010006.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21220201013023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10610100505011 + 10610100505012.

It is an arithmetic number, because the mean of its divisors is an integer number (10610100505012).

Almost surely, 2^{21220201010023} is an apocalyptic number.

21220201010023 is a deficient number, since it is larger than the sum of its proper divisors (1).

21220201010023 is an equidigital number, since it uses as much as digits as its factorization.

21220201010023 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 16.

Adding to 21220201010023 its reverse (32001010202212), we get a palindrome (53221211212235).

The spelling of 21220201010023 in words is "twenty-one trillion, two hundred twenty billion, two hundred one million, ten thousand, twenty-three".