21112023011 has 8 divisors (see below), whose sum is σ = 21286831104. Its totient is φ = 20937421960.

The previous prime is 21112023001. The next prime is 21112023067. The reversal of 21112023011 is 11032021112.

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 21112023011 - 2¹⁸ = 21111760867 is a prime.

It is a super-2 number, since 2×21112023011² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21112023001) 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 7 ways as a sum of consecutive naturals, for example, 156470 + ... + 258276.

It is an arithmetic number, because the mean of its divisors is an integer number (2660853888).

Almost surely, 2^21112023011 is an apocalyptic number.

21112023011 is a deficient number, since it is larger than the sum of its proper divisors (174808093).

21112023011 is a wasteful number, since it uses less digits than its factorization.

21112023011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103521.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 21112023011 its reverse (11032021112), we get a palindrome (32144044123).

The spelling of 21112023011 in words is "twenty-one billion, one hundred twelve million, twenty-three thousand, eleven".