21033142011 has 48 divisors (see below), whose sum is σ = 36053035200. Its totient is φ = 11561082624.

The previous prime is 21033141977. The next prime is 21033142087. The reversal of 21033142011 is 11024133012.

21033142011 is a `hidden beast` number, since 210 + 3 + 31 + 420 + 1 + 1 = 666.

It is not a de Polignac number, because 21033142011 - 2¹⁸ = 21032879867 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21033142111) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 470065 + ... + 512861.

It is an arithmetic number, because the mean of its divisors is an integer number (751104900).

Almost surely, 2^21033142011 is an apocalyptic number.

21033142011 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

21033142011 is a deficient number, since it is larger than the sum of its proper divisors (15019893189).

21033142011 is a wasteful number, since it uses less digits than its factorization.

21033142011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43108 (or 43105 counting only the distinct ones).

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

Adding to 21033142011 its reverse (11024133012), we get a palindrome (32057275023).

The spelling of 21033142011 in words is "twenty-one billion, thirty-three million, one hundred forty-two thousand, eleven".