21011122430 has 16 divisors (see below), whose sum is σ = 38440021824. Its totient is φ = 8266670880.

The previous prime is 21011122423. The next prime is 21011122439. The reversal of 21011122430 is 3422111012.

It is a junction number, because it is equal to n+sod(n) for n = 21011122399 and 21011122408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21011122439) 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, 17221622 + ... + 17222841.

It is an arithmetic number, because the mean of its divisors is an integer number (2402501364).

Almost surely, 2^21011122430 is an apocalyptic number.

21011122430 is a deficient number, since it is larger than the sum of its proper divisors (17428899394).

21011122430 is a wasteful number, since it uses less digits than its factorization.

21011122430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34444531.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 21011122430 its reverse (3422111012), we get a palindrome (24433233442).

The spelling of 21011122430 in words is "twenty-one billion, eleven million, one hundred twenty-two thousand, four hundred thirty".