21030133111 has 4 divisors (see below), whose sum is σ = 22647835672. Its totient is φ = 19412430552.

The previous prime is 21030133093. The next prime is 21030133129. The reversal of 21030133111 is 11133103012.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (21030133093) and next prime (21030133129).

It is a cyclic number.

It is not a de Polignac number, because 21030133111 - 2⁵ = 21030133079 is a prime.

It is a super-3 number, since 3×21030133111³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21030133151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 808851261 + ... + 808851286.

It is an arithmetic number, because the mean of its divisors is an integer number (5661958918).

Almost surely, 2^21030133111 is an apocalyptic number.

21030133111 is a deficient number, since it is larger than the sum of its proper divisors (1617702561).

21030133111 is a wasteful number, since it uses less digits than its factorization.

21030133111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1617702560.

The product of its (nonzero) digits is 54, while the sum is 16.

Adding to 21030133111 its reverse (11133103012), we get a palindrome (32163236123).

The spelling of 21030133111 in words is "twenty-one billion, thirty million, one hundred thirty-three thousand, one hundred eleven".