13533011021 has 2 divisors, whose sum is σ = 13533011022. Its totient is φ = 13533011020.

The previous prime is 13533010993. The next prime is 13533011027. The reversal of 13533011021 is 12011033531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7865029225 + 5667981796 = 88685^2 + 75286^2 .

It is a cyclic number.

It is not a de Polignac number, because 13533011021 - 2²⁶ = 13465902157 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 13533010984 and 13533011002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13533011027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6766505510 + 6766505511.

It is an arithmetic number, because the mean of its divisors is an integer number (6766505511).

Almost surely, 2^13533011021 is an apocalyptic number.

It is an amenable number.

13533011021 is a deficient number, since it is larger than the sum of its proper divisors (1).

13533011021 is an equidigital number, since it uses as much as digits as its factorization.

13533011021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 270, while the sum is 20.

Adding to 13533011021 its reverse (12011033531), we get a palindrome (25544044552).

The spelling of 13533011021 in words is "thirteen billion, five hundred thirty-three million, eleven thousand, twenty-one".