21030382911 has 8 divisors (see below), whose sum is σ = 28202595120. Its totient is φ = 13939212992.

The previous prime is 21030382907. The next prime is 21030382949. The reversal of 21030382911 is 11928303012.

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 21030382911 - 2² = 21030382907 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21030382991) 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, 20259966 + ... + 20261003.

It is an arithmetic number, because the mean of its divisors is an integer number (3525324390).

Almost surely, 2^21030382911 is an apocalyptic number.

21030382911 is a deficient number, since it is larger than the sum of its proper divisors (7172212209).

21030382911 is a wasteful number, since it uses less digits than its factorization.

21030382911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40521145.

The product of its (nonzero) digits is 2592, while the sum is 30.

Adding to 21030382911 its reverse (11928303012), we get a palindrome (32958685923).

The spelling of 21030382911 in words is "twenty-one billion, thirty million, three hundred eighty-two thousand, nine hundred eleven".