21003311030 has 32 divisors (see below), whose sum is σ = 40876381728. Its totient is φ = 7724160000.

The previous prime is 21003311009. The next prime is 21003311033. The reversal of 21003311030 is 3011330012.

It is a super-2 number, since 2×21003311030² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21003310996 and 21003311014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21003311033) 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, 289211 + ... + 354470.

It is an arithmetic number, because the mean of its divisors is an integer number (1277386929).

Almost surely, 2^21003311030 is an apocalyptic number.

21003311030 is a deficient number, since it is larger than the sum of its proper divisors (19873070698).

21003311030 is a wasteful number, since it uses less digits than its factorization.

21003311030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 643952.

The product of its (nonzero) digits is 54, while the sum is 14.

Adding to 21003311030 its reverse (3011330012), we get a palindrome (24014641042).

The spelling of 21003311030 in words is "twenty-one billion, three million, three hundred eleven thousand, thirty".