21120334011 has 64 divisors (see below), whose sum is σ = 36157363200. Its totient is φ = 11935123200.

The previous prime is 21120333989. The next prime is 21120334021. The reversal of 21120334011 is 11043302112.

21120334011 is a `hidden beast` number, since 211 + 20 + 33 + 401 + 1 = 666.

It is not a de Polignac number, because 21120334011 - 2¹⁵ = 21120301243 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21120334021) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7380721 + ... + 7383581.

It is an arithmetic number, because the mean of its divisors is an integer number (564958800).

Almost surely, 2^21120334011 is an apocalyptic number.

21120334011 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

21120334011 is a deficient number, since it is larger than the sum of its proper divisors (15037029189).

21120334011 is a wasteful number, since it uses less digits than its factorization.

21120334011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3297 (or 3291 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 21120334011 its reverse (11043302112), we get a palindrome (32163636123).

The spelling of 21120334011 in words is "twenty-one billion, one hundred twenty million, three hundred thirty-four thousand, eleven".