21010303031223 has 16 divisors (see below), whose sum is σ = 30563255071872. Its totient is φ = 12732344364000.

The previous prime is 21010303031209. The next prime is 21010303031231. The reversal of 21010303031223 is 32213030301012.

It is not a de Polignac number, because 21010303031223 - 2¹² = 21010303027127 is a prime.

It is a super-2 number, since 2×21010303031223² (a number of 27 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 21010303031223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21010303036223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28951773 + ... + 29668598.

It is an arithmetic number, because the mean of its divisors is an integer number (1910203441992).

Almost surely, 2^{21010303031223} is an apocalyptic number.

21010303031223 is a deficient number, since it is larger than the sum of its proper divisors (9552952040649).

21010303031223 is a wasteful number, since it uses less digits than its factorization.

21010303031223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58631246.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 21010303031223 its reverse (32213030301012), we get a palindrome (53223333332235).

The spelling of 21010303031223 in words is "twenty-one trillion, ten billion, three hundred three million, thirty-one thousand, two hundred twenty-three".