21012033333 has 16 divisors (see below), whose sum is σ = 28670976000. Its totient is φ = 13681782576.

The previous prime is 21012033311. The next prime is 21012033347. The reversal of 21012033333 is 33333021012.

It is not a de Polignac number, because 21012033333 - 2¹³ = 21012025141 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21012033373) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84333 + ... + 221666.

It is an arithmetic number, because the mean of its divisors is an integer number (1791936000).

Almost surely, 2^21012033333 is an apocalyptic number.

It is an amenable number.

21012033333 is a deficient number, since it is larger than the sum of its proper divisors (7658942667).

21012033333 is a wasteful number, since it uses less digits than its factorization.

21012033333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306536.

The product of its (nonzero) digits is 972, while the sum is 21.

Adding to 21012033333 its reverse (33333021012), we get a palindrome (54345054345).

The spelling of 21012033333 in words is "twenty-one billion, twelve million, thirty-three thousand, three hundred thirty-three".