21225115301 has 4 divisors (see below), whose sum is σ = 22857816492. Its totient is φ = 19592414112.

The previous prime is 21225115279. The next prime is 21225115367. The reversal of 21225115301 is 10351152212.

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 3965724676 + 17259390625 = 62974^2 + 131375^2 .

It is a cyclic number.

It is not a de Polignac number, because 21225115301 - 2¹⁰ = 21225114277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21225118301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 816350576 + ... + 816350601.

It is an arithmetic number, because the mean of its divisors is an integer number (5714454123).

Almost surely, 2^21225115301 is an apocalyptic number.

It is an amenable number.

21225115301 is a deficient number, since it is larger than the sum of its proper divisors (1632701191).

21225115301 is a wasteful number, since it uses less digits than its factorization.

21225115301 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1632701190.

The product of its (nonzero) digits is 600, while the sum is 23.

Adding to 21225115301 its reverse (10351152212), we get a palindrome (31576267513).

The spelling of 21225115301 in words is "twenty-one billion, two hundred twenty-five million, one hundred fifteen thousand, three hundred one".