231020202013321 has 16 divisors (see below), whose sum is σ = 269135782666240. Its totient is φ = 194215994341200.

The previous prime is 231020202013303. The next prime is 231020202013361. The reversal of 231020202013321 is 123310202020132.

It is a cyclic number.

It is not a de Polignac number, because 231020202013321 - 2¹¹ = 231020202011273 is a prime.

It is a super-2 number, since 2×231020202013321² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 231020202013292 and 231020202013301.

It is not an unprimeable number, because it can be changed into a prime (231020202013361) 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, 1383221301 + ... + 1383388306.

It is an arithmetic number, because the mean of its divisors is an integer number (16820986416640).

Almost surely, 2^{231020202013321} is an apocalyptic number.

It is an amenable number.

231020202013321 is a deficient number, since it is larger than the sum of its proper divisors (38115580652919).

231020202013321 is a wasteful number, since it uses less digits than its factorization.

231020202013321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2766609844.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 231020202013321 its reverse (123310202020132), we get a palindrome (354330404033453).

The spelling of 231020202013321 in words is "two hundred thirty-one trillion, twenty billion, two hundred two million, thirteen thousand, three hundred twenty-one".