13223101021 has 4 divisors (see below), whose sum is σ = 14240262652. Its totient is φ = 12205939392.

The previous prime is 13223100941. The next prime is 13223101027. The reversal of 13223101021 is 12010132231.

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 8076616900 + 5146484121 = 89870^2 + 71739^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13223101021 is a prime.

It is a super-2 number, since 2×13223101021² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13223100986 and 13223101004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13223101027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 508580796 + ... + 508580821.

It is an arithmetic number, because the mean of its divisors is an integer number (3560065663).

Almost surely, 2^13223101021 is an apocalyptic number.

It is an amenable number.

13223101021 is a deficient number, since it is larger than the sum of its proper divisors (1017161631).

13223101021 is a wasteful number, since it uses less digits than its factorization.

13223101021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1017161630.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 13223101021 its reverse (12010132231), we get a palindrome (25233233252).

It can be divided in two parts, 13223 and 101021, that added together give a square (114244 = 338²).

The spelling of 13223101021 in words is "thirteen billion, two hundred twenty-three million, one hundred one thousand, twenty-one".