21021332131033 has 6 divisors (see below), whose sum is σ = 22762744260414. Its totient is φ = 19404306582336.

The previous prime is 21021332131021. The next prime is 21021332131043. The reversal of 21021332131033 is 33013123312012.

It can be written as a sum of positive squares in 3 ways, for example, as 436482206224 + 20584849924809 = 660668^2 + 4537053^2 .

It is not a de Polignac number, because 21021332131033 - 2⁹ = 21021332130521 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21021332130989 and 21021332131007.

It is not an unprimeable number, because it can be changed into a prime (21021332131043) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 62193290160 + ... + 62193290497.

It is an arithmetic number, because the mean of its divisors is an integer number (3793790710069).

Almost surely, 2^{21021332131033} is an apocalyptic number.

It is an amenable number.

21021332131033 is a deficient number, since it is larger than the sum of its proper divisors (1741412129381).

21021332131033 is a wasteful number, since it uses less digits than its factorization.

21021332131033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124386580683 (or 124386580670 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 25.

Adding to 21021332131033 its reverse (33013123312012), we get a palindrome (54034455443045).

The spelling of 21021332131033 in words is "twenty-one trillion, twenty-one billion, three hundred thirty-two million, one hundred thirty-one thousand, thirty-three".