21012332033 has 16 divisors (see below), whose sum is σ = 26429037696. Its totient is φ = 16228343040.

The previous prime is 21012332021. The next prime is 21012332059. The reversal of 21012332033 is 33023321012.

It is not a de Polignac number, because 21012332033 - 2¹⁰ = 21012331009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21012331996 and 21012332014.

It is not an unprimeable number, because it can be changed into a prime (21012332063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1198766 + ... + 1216167.

It is an arithmetic number, because the mean of its divisors is an integer number (1651814856).

Almost surely, 2^21012332033 is an apocalyptic number.

It is an amenable number.

21012332033 is a deficient number, since it is larger than the sum of its proper divisors (5416705663).

21012332033 is a wasteful number, since it uses less digits than its factorization.

21012332033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2415064.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 21012332033 its reverse (33023321012), we get a palindrome (54035653045).

The spelling of 21012332033 in words is "twenty-one billion, twelve million, three hundred thirty-two thousand, thirty-three".