21003222113 has 4 divisors (see below), whose sum is σ = 21013164228. Its totient is φ = 20993280000.

The previous prime is 21003222029. The next prime is 21003222283. The reversal of 21003222113 is 31122230012.

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 8008818064 + 12994404049 = 89492^2 + 113993^2 .

It is a cyclic number.

It is not a de Polignac number, because 21003222113 - 2¹⁸ = 21002959969 is a prime.

It is a super-2 number, since 2×21003222113² (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 = 21003222091 and 21003222100.

It is not an unprimeable number, because it can be changed into a prime (21003252113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4967888 + ... + 4972113.

It is an arithmetic number, because the mean of its divisors is an integer number (5253291057).

Almost surely, 2^21003222113 is an apocalyptic number.

It is an amenable number.

21003222113 is a deficient number, since it is larger than the sum of its proper divisors (9942115).

21003222113 is an equidigital number, since it uses as much as digits as its factorization.

21003222113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9942114.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21003222113 its reverse (31122230012), we get a palindrome (52125452125).

The spelling of 21003222113 in words is "twenty-one billion, three million, two hundred twenty-two thousand, one hundred thirteen".