21022003111 has 8 divisors (see below), whose sum is σ = 21756074400. Its totient is φ = 20288543520.

The previous prime is 21022003109. The next prime is 21022003117. The reversal of 21022003111 is 11130022012.

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 21022003111 - 2¹ = 21022003109 is a prime.

It is a super-2 number, since 2×21022003111² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21022003091 and 21022003100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21022003117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82435 + ... + 220996.

It is an arithmetic number, because the mean of its divisors is an integer number (2719509300).

Almost surely, 2^21022003111 is an apocalyptic number.

21022003111 is a deficient number, since it is larger than the sum of its proper divisors (734071289).

21022003111 is a wasteful number, since it uses less digits than its factorization.

21022003111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305849.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 21022003111 its reverse (11130022012), we get a palindrome (32152025123).

The spelling of 21022003111 in words is "twenty-one billion, twenty-two million, three thousand, one hundred eleven".