21001103312223 has 8 divisors (see below), whose sum is σ = 28476072288000. Its totient is φ = 13763434938968.

The previous prime is 21001103312197. The next prime is 21001103312227. The reversal of 21001103312223 is 32221330110012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21001103312223 - 2⁶ = 21001103312159 is a prime.

It is a super-2 number, since 2×21001103312223² (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 21001103312223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21001103312227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59325150423 + ... + 59325150776.

It is an arithmetic number, because the mean of its divisors is an integer number (3559509036000).

Almost surely, 2^{21001103312223} is an apocalyptic number.

21001103312223 is a deficient number, since it is larger than the sum of its proper divisors (7474968975777).

21001103312223 is a wasteful number, since it uses less digits than its factorization.

21001103312223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118650301261.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 21001103312223 its reverse (32221330110012), we get a palindrome (53222433422235).

The spelling of 21001103312223 in words is "twenty-one trillion, one billion, one hundred three million, three hundred twelve thousand, two hundred twenty-three".