21202330112225 has 12 divisors (see below), whose sum is σ = 26290952708460. Its totient is φ = 16961823206400.

The previous prime is 21202330112207. The next prime is 21202330112231. The reversal of 21202330112225 is 52221103320212.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 1145824666624 + 20056505445601 = 1070432^2 + 4478449^2 .

It is not a de Polignac number, because 21202330112225 - 2⁸ = 21202330111969 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21202330112194 and 21202330112203.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13735505 + ... + 15200945.

It is an arithmetic number, because the mean of its divisors is an integer number (2190912725705).

Almost surely, 2^{21202330112225} is an apocalyptic number.

21202330112225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21202330112225 is a deficient number, since it is larger than the sum of its proper divisors (5088622596235).

21202330112225 is a wasteful number, since it uses less digits than its factorization.

21202330112225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2044180 (or 2044175 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

Adding to 21202330112225 its reverse (52221103320212), we get a palindrome (73423433432437).

The spelling of 21202330112225 in words is "twenty-one trillion, two hundred two billion, three hundred thirty million, one hundred twelve thousand, two hundred twenty-five".