21201033011033 has 4 divisors (see below), whose sum is σ = 21201688589988. Its totient is φ = 21200377432080.

The previous prime is 21201033011009. The next prime is 21201033011063. The reversal of 21201033011033 is 33011033010212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2739677108809 + 18461355902224 = 1655197^2 + 4296668^2 .

It is a cyclic number.

It is not a de Polignac number, because 21201033011033 - 2⁸ = 21201033010777 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21201033010996 and 21201033011014.

It is not an unprimeable number, because it can be changed into a prime (21201033011063) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 327740966 + ... + 327805647.

It is an arithmetic number, because the mean of its divisors is an integer number (5300422147497).

Almost surely, 2^{21201033011033} is an apocalyptic number.

It is an amenable number.

21201033011033 is a deficient number, since it is larger than the sum of its proper divisors (655578955).

21201033011033 is an equidigital number, since it uses as much as digits as its factorization.

21201033011033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 655578954.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 21201033011033 its reverse (33011033010212), we get a palindrome (54212066021245).

The spelling of 21201033011033 in words is "twenty-one trillion, two hundred one billion, thirty-three million, eleven thousand, thirty-three".