21033221021313 has 16 divisors (see below), whose sum is σ = 28662962866176. Its totient is φ = 13713271200720.

The previous prime is 21033221021311. The next prime is 21033221021317. The reversal of 21033221021313 is 31312012233012.

It is not a de Polignac number, because 21033221021313 - 2¹ = 21033221021311 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21033221021311) 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, 57057943 + ... + 57425388.

It is an arithmetic number, because the mean of its divisors is an integer number (1791435179136).

Almost surely, 2^{21033221021313} is an apocalyptic number.

It is an amenable number.

21033221021313 is a deficient number, since it is larger than the sum of its proper divisors (7629741844863).

21033221021313 is a wasteful number, since it uses less digits than its factorization.

21033221021313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114484684.

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 21033221021313 its reverse (31312012233012), we get a palindrome (52345233254325).

The spelling of 21033221021313 in words is "twenty-one trillion, thirty-three billion, two hundred twenty-one million, twenty-one thousand, three hundred thirteen".